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Asymmetric Cell Division – How Flowering Plant Cells Get Their Unique Identity

  • R. M. Ranganath
Part of the Progress in Molecular and Subcellular Biology book series (PMSB, volume 45)

Keywords

Shoot Apical Meristem Female Gametophyte Endosperm Development Quiescent Centre Asymmetric Cell Division 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Acosta-Garcia G, Vielle-Calzada J-P (2004) A classical Arabinogalactan protein is essential for the initiation of female gametogenesis in Arabidopsis. Plant Cell 16:2614–2628.PubMedCrossRefGoogle Scholar
  2. Asker SE, Jerling L (1992) Apomixis in plants. CRC, Boca Raton.Google Scholar
  3. Baurie I, Laux T (2003) Apical meristems: the plant's fountain of youth. BioEssays 25:961–970.CrossRefGoogle Scholar
  4. Becraft PW, Asuncion-Crabb Y (2000) Positional cues specify and maintain aleurone cell fate in maize endosperm development. Development 127:4039–4048.PubMedGoogle Scholar
  5. Becraft, PW, Li K, Dey N, Asuncion-Crabb Y (2002) The maize dek1 gene functions in embryonic pattern formation and cell fate specification. Development 129:5217–5225.PubMedGoogle Scholar
  6. Berger F (1999) Endosperm development. Curr Opin Plant Biol 2:28–32.PubMedCrossRefGoogle Scholar
  7. Bergmann DC, Lukowitz W, Somerville CR (2004) Stomatal development and pattern controlled by a MAPKK kinase. Science 304:1494–1497.PubMedCrossRefGoogle Scholar
  8. Bonhomme S, Horlow C, Vezon D et al. (1998) T-DNA mediated disruption of essential genes in Arabidopsis is unexpectedly rare and can not be inferred from segregation distortion alone. Mol Gen Genet 260:444–452.PubMedCrossRefGoogle Scholar
  9. Bonke M, Thitamadee S, Mahonen AP, Hauser M-T, Helariutta Y (2003) APL regulates vascular tissue identity in Arabidopsis. Nature 426:181–186.PubMedCrossRefGoogle Scholar
  10. Boutilier K, Offringa R, Sharma VK et al. (2002) Ectopic expression of BABY BOOM triggers a conversion from vegetative to embryonic growth. Plant Cell 14:1737–1749.PubMedCrossRefGoogle Scholar
  11. Byrne ME (2005) Networks in leaf development. Curr Opin Plant Biol 8:59–66.PubMedCrossRefGoogle Scholar
  12. Byrne ME, Kidner CA, Martienssen RA (2003) Plant stem cells: divergent pathways and common themes in shoots and roots. Curr Opin Genet Devel 13:551–557.CrossRefGoogle Scholar
  13. Coen ES, Mayerowitz EM (1991) The war of the whorls: genetic interactions controlling flower development. Nature 353:31–37.PubMedCrossRefGoogle Scholar
  14. Colcombet J, Bolsson-Demier A, Ros-Palau R, Vera CE, Schroeder JI (2005) Arabidopsis SOMATC EMBRYOGENESIS RECEPTOR KINASE1 and 2 are essential for tapetum development and microspore maturation. Plant Cell 17: 3350–3361.PubMedCrossRefGoogle Scholar
  15. Demura T, Tashiro G, Horiguchi G, Kishimoto N et al. (2002) Visualization by comprehensive microarray analysis of gene expression programs during transdifferentiation of mesophyll cells into xylem cells. Proc Natl Acad Sci USA 99:15794–15799.PubMedCrossRefGoogle Scholar
  16. Di Laurenzio L, Wysoka-Diller J, Malamy JE, Pysh L, Helariutta Y, Freshour G, Hahn MG, Feldmann KA, Benfey PN (1996) The SCARECROW gene regulates an asymmetric division that is essential for generating the radial organization of the Arabidopsis root. Cell 86:423–433.PubMedCrossRefGoogle Scholar
  17. Dinneny JR, Yanofsky MF (2004) Vascular patterning: xylem or phloem? Curr Biol 14(3):R112–R114.PubMedGoogle Scholar
  18. Dodeman VL, Ducreux G, Kreis M (1997) Zygotic embryogenesis versus somatic embryogenesis. J Exp Bot 48:1493–1509.Google Scholar
  19. Dolan L, Costa S (2001) Evolution and genetics of root hair stripes in the root epidermis. J Exp Bot 52:413–417.PubMedGoogle Scholar
  20. Dolan L, Roberts K (1995) Two ways to skin a plant: the analysis of root and shoot epidermal development in Arabidopsis. BioEssays 17:865–872.CrossRefGoogle Scholar
  21. Dresselhaus T (2006) Cell-cell communication during double fertilization. Curr Opin Plant Biol 9:41–47.PubMedCrossRefGoogle Scholar
  22. Drews GN, Yadegari R (2002) Development and function of the angiosperm female gametophyte. Ann Rev Genet 36:99–124.PubMedCrossRefGoogle Scholar
  23. Ebel C, Mariconti L, Gruissem W (2004) Plant retinoblastoma homologues control nuclear proliferation in the female gametophyte. Nature 429:776–780.PubMedCrossRefGoogle Scholar
  24. Eckardt NA (2002) Plant reproduction: insights into the “Abominable Mystery”. (Meeting Report). Plant Cell 14:1669–1673.PubMedCrossRefGoogle Scholar
  25. Emery JF, Floyd SK, Alvarez J et al. (2003) Radial patterning of Arabidopsis shoots by class III HD-ZIP and KANADI genes. Curr Biol 13:1768–1774.PubMedCrossRefGoogle Scholar
  26. Fletcher N (2002) Shoot and floral meristem maintenance in Arabidopsis. Annu Rev Plant Biol 53:45–66.PubMedCrossRefGoogle Scholar
  27. Friml J, Vieten A, Sauer M et al. (2003) Efflux-dependent auxin gradients establish the apical-basal axis of Arabidopsis. Nature 426:147–153.PubMedCrossRefGoogle Scholar
  28. Fukaki H, Wysoka-Diller J, Kato T, Fujisawa H, Benfey PN, Tasaka M (1998) Genetic evidence that the endodermis is essential for shoot gravitropism in Arabidopsis thaliana. Plant J 14:425–430.PubMedCrossRefGoogle Scholar
  29. Fukuda H (2004) Signals that control plant vascular cell differentiation. Nature Rev Mol Cell Biol 5:379–391.CrossRefGoogle Scholar
  30. Gallagher K, Smith LG (1999) Discordia mutations specifically misorient cell division during development of maize leaf epidermis. Development 126: 4623–4633.PubMedGoogle Scholar
  31. Gaudin V, Libault M, Pouteau S, Juul T, Zhao G, Lefebvre D, Grandjean O (2001) Mutations in LIKE HETEROCHROMATIN PROTEIN1 affect flowering time and plant architecture in Arabidopsis. Development 128:4847–4858.PubMedGoogle Scholar
  32. Geisler MJ, Deppong DO, Nadeau JA, Sack FD (2003) Stomatal neighbour cell polarity and division in Arabidopsis. Planta 216:571–579.PubMedGoogle Scholar
  33. Gilbert SF (2000) Developmental biology, 6th edn. Sinauer Associates, Sunderland, Massachussets.Google Scholar
  34. Gurdon JB, Byrne JA (2003) The first half century of nuclear transplantation. Proc Natl Acad Sci USA 100:8048–8052.PubMedCrossRefGoogle Scholar
  35. Haecker A, Gross-Hardt R, Geiges B, Sarkar A, Breuninger H, Herrmann M, Laux T (2004) Expression dynamics of WOX genes mark cell fate decisions during early embryonic patterning in Arabidopsis thaliana. Development 131:657–668.PubMedCrossRefGoogle Scholar
  36. Hake S, Char BR, Chuck G, Foster T, Long J, Jackson D (1995) Homeobox genes in the functioning of plant meristems. Phil Trans R Soc London B 350:45–61.CrossRefGoogle Scholar
  37. Hardtke CS (2006) Root development – branching into novel spheres. Curr Opin Plant Biol 9:66–71.PubMedCrossRefGoogle Scholar
  38. Heidstra R, Welch D, Scheres B ( 2004) Mosaic analyses using marked activation and deletion clones dissect Arabidopsis SCARECROW action in asymmetric cell division. Genes Devel 18:1964–1969.PubMedCrossRefGoogle Scholar
  39. Helariutta Y, Fukaki H, Wysocka-Diller J, Nakajima K, Jung J, Sena G, Hauser M-T, Benfey PN (2000) The SHORT-ROOT gene controls radial patterning of the Arabidopsis root through radial signaling. Cell 101:555–567.PubMedCrossRefGoogle Scholar
  40. Honys D, Twell D (2004) Transcriptome analysis of male gametophyte development in Arabidopsis. Genome Biol 5:R85 (doi 10:1186/gb2004–5-11–85).PubMedCrossRefGoogle Scholar
  41. Horvitz HR, Herskowitz I (1992) Mechanisms of asymmetric division: two Bs are not two Bs, that is the question. Cell 68:237–255.PubMedCrossRefGoogle Scholar
  42. Huang B-Q, Russell SD (1992) Female germ unit: organization, isolation and function. Int Rev Cytol 140:233–292.CrossRefGoogle Scholar
  43. Hulskamp M (2004) Plant trichomes: a model for cell differentiation. Nature Rev Mol Cell Biol 5:471–480.CrossRefGoogle Scholar
  44. Iwakawa H, Shinmyo A, Sekine M (2006) Arabidopsis CDKA1, a cdc2 homologue, controls proliferation of generative cells in male gametogenesis. Plant J 45: 819–831.PubMedCrossRefGoogle Scholar
  45. Jack T (2004) Molecular and genetic mechanisms of floral control. Plant Cell 16:S1–S17.PubMedCrossRefGoogle Scholar
  46. Jackson D, Veit B, Hake S (1994) Expression of maize KNOTTED1 related homeobox genes in the shoot apical meristem predicts patterns of morphogenesis in the vegetative shoot. Development 120:405–413.Google Scholar
  47. Jasinski S, Piazza P, Craft J, Hay A, Woolley L, Rieu I, Phillips A, Hedden P, Tsiantis M (2005) KNOX action in Arabidopsis is mediated by coordinate regulation of cytokinin and gibberellin activities. Current Biol 15:1560–1565.CrossRefGoogle Scholar
  48. Jenik PD, Jurkuta REJ, Barton MK (2005) Interactions between the cell cycle and embryonic patterning in Arabidopsis uncovered by a mutation in DNA polymerase EWOA. Plant Cell 17:3362–3377.PubMedCrossRefGoogle Scholar
  49. Jiang K, Feldman LJ (2005) Regulation of root apical meristem development. Ann Rev Cell dev Biol 21:485–509.CrossRefGoogle Scholar
  50. Johnson MA, von Besser K, Zhou Q, Smith E, Aux G, Patton D, Levin JZ, Preuss D (2004) Arabidopsis hapless mutations define essential gametophytic functions. Genetics 168:971–982.PubMedCrossRefGoogle Scholar
  51. Johnson-Brousseau SA, McCormick S (2004) A compendium of methods useful for characterizing Arabidopsis pollen mutants and gametophytically expressed genes. Plant J 39:761–775.PubMedCrossRefGoogle Scholar
  52. Jurgens G (2001) Apical-basal pattern formation in Arabidopsis embryogenesis. EMBO J 20:3609–3616.PubMedCrossRefGoogle Scholar
  53. Kamiya N, Itoh J-I, Morikami A, Nagato Y, Matsuoka M (2003) The SCARECROW gene's role in asymmetric cell divisions in rice. Plant J 36:45–54.PubMedCrossRefGoogle Scholar
  54. Kidner C, Sundaresan V, Roberts K, Dolan L (2000) Clonal analysis of the Arabidopsis root confirms that position, not lineage, determines cell fate. Planta 211:191–199.PubMedCrossRefGoogle Scholar
  55. Kim HU, Li Y, Huang AHC (2005) Ubiquitous and endosplasmic reticulum-located Lysophosphotidyl Acetyltransferase, LAPT2, is essential for female but not male gametophyte development in Arabidopsis. Plant Cell 17:1073–1089.PubMedCrossRefGoogle Scholar
  56. Krikorian AD, Smith DL (1992) Somatic embryogenesis in carrot (Daucus carota). In: Lindsey K (ed) Plant tissue culture manual. Kluwer Academic Publishers, Dordrecht, A9, pp 1–32.Google Scholar
  57. Kubo M, Udagawa M, Nishikubo N, Horiguchi G, Yamaguchi M, Ito J, Mimura T, Fukuda H, Demura T (2005) Transcriptome switches for protoxylem and metaxylem vessels. Genes Dev 19:1855–1860.PubMedCrossRefGoogle Scholar
  58. Kurata T, Okada K, Wada T (2005) Intercellular movement of transcription factors. Curr Opin Plant Biol 8:600–605.PubMedCrossRefGoogle Scholar
  59. Lalanne E, Michelidis C, Moore JM, Gagliano W, Johnson A, Patel R, Howden R, Vielle-Calzada J-P, Grossniklaus U, Twell D (2004) Analysis of transposon insertion mutants highlights the diversity of mechanisms underlying male progamic development in Arabidopsis. Genetics 167:1975–1986.PubMedCrossRefGoogle Scholar
  60. Laux T (2003) The stem cell concept in plants: a matter of debate. Cell 113:281–283.PubMedCrossRefGoogle Scholar
  61. Laux T, Wurschum T, Breuninger H (2004) Genetic regulation of embryonic pattern formation. Plant Cell 16:S190–S202.PubMedCrossRefGoogle Scholar
  62. Levy YY, Dean C (1998) The transition to flowering. Plant Cell 10:1973–1990.PubMedCrossRefGoogle Scholar
  63. Lid SE, Gruis D, Jung R et al. (2002) The defective kernel 1 (dek1) gene required for aleurone cell development in the endosperm of maize grains encodes a membrane protein of the calpain gene superfamily. Proc Natl Sci Acad USA 99:5460–5465.CrossRefGoogle Scholar
  64. Long JA, Moan EI, Medford JI, Barton MK (1996) A member of the KNOTTED class of homeobox proteins encoded by the STM gene of Arabidopsis. Nature 379:66–69.PubMedCrossRefGoogle Scholar
  65. Lotan T, Ohto M-A, Yee KM et al. (1998) Arabidopsis LEAFY COTYLEDON1 is sufficient to induce embryo development in vegetative cells. Cell 93:1195–1205.PubMedCrossRefGoogle Scholar
  66. Lu P, Porat R, Nadeau JA, O'Neill SD (1996) Identification of a meristem L1 layer-specific gene in Arabidopsis that is expressed during embryonic pattern formation and defines a new class of homeobox genes. Plant Cell 8:2155–2168.PubMedCrossRefGoogle Scholar
  67. Lukowitz W, Roeder A, Parmenter D, Somerville C (2004) A MAPKK kinase gene regulates extra-embryonic cell fate in Arabidopsis. Cell 116:109–119.PubMedCrossRefGoogle Scholar
  68. Ma H (2005) Molecular genetic analyses of microspororgenesis and microgametogenesis in flowering plants. Ann Rev Plant Biol 56:393–434.CrossRefGoogle Scholar
  69. Mattsson J, Ckurshumova W, Berleth T (2004) Auxin signaling in Arabidopsis leaf vascular development. Plant Physiol 131:1327–1339.CrossRefGoogle Scholar
  70. Mayer U, Buttner G, Jurgens G (1993) Apical-basal pattern in the Arabidopsis embryo: studies on the gnom gene. Development 117:149–162.Google Scholar
  71. Mayer KFX, Schoof H, Haecker A, Lenhard M, Jurgens G, Laux T (1998) Role of WUSCHEL in regulating stem cell fate in the Arabidopsis shoot meristem. Cell 95:805–815.PubMedCrossRefGoogle Scholar
  72. McCormick S (2004) Control of male gametophyte development. Plant Cell 16:S142–S153.PubMedCrossRefGoogle Scholar
  73. Meinke DW (1991) Perspectives on genetic analysis of plant embryogenesis. Plant Cell 3:857–876.PubMedCrossRefGoogle Scholar
  74. Moon Y-H, Chen L, Pan R-L et al. (2002) EMF repression of embryo and flower development in Arabidopsis. Abstract 11–22, XIII International Conference on Arabidopsis Research, Seville.Google Scholar
  75. Morison SJ, Kimble J (2006) Asymmetric and symmetric stem cell divisions in development and cancer. Nature 441.Google Scholar
  76. Nadeau JA, Sack FD (2003) Stomatal development: cross talk puts mouths in place. Trends Plant Sci 8:294–299.PubMedCrossRefGoogle Scholar
  77. Nakajima K, Sena G, Benfey PN (2001) Intercellular movement of the putative transcription factor SHR in root patterning. Nature 413:307–311.PubMedCrossRefGoogle Scholar
  78. Natesh S, Rau MA (1984) The embryo: in embryology of angiosperms. Johri BM (ed) Springer, Berlin Heidelberg New York, pp 377–443.Google Scholar
  79. Nawy T, Lee J-Y, Colinas J et al. (2005) Transcriptional profile of the Arabidopsis root Quiescent Center. Plant Cell 17:1908–1925.PubMedCrossRefGoogle Scholar
  80. Nowack MK, Grini PE, Jakoby MJ, Lafos M, Koncz C, Schnittger A (2006) A positive signal from the fertilization of the egg cell sets of endosperm proliferation in angiosperm embryogenesis. Nature Genet 38:63–67.PubMedCrossRefGoogle Scholar
  81. Olsen O-A (2001) Endosperm development: cellularization and cell fate specification. Ann Rev Plant Physiol 52:233–267.CrossRefGoogle Scholar
  82. Olsen O-A (2004a) Dynamics of maize aleurone cell formation: the ‘surface’ rule. Maydica 49(1):37–40.Google Scholar
  83. Olsen O-A (2004b) Nuclear endosperm development in cereals and Arabidopsis thaliana. Plant Cell 16:S214–S227.PubMedCrossRefGoogle Scholar
  84. Pagnussat GC, Yu H-J, Ngo QA, Rajani S, Mayalagu S, Johnson CS, Capron A, Xie L-F, Ye D, Sundaresan V (2005) Genetic and molecular identification of genes required for female gametophyte development and function in Arabidopsis. Development 132:603–614.PubMedCrossRefGoogle Scholar
  85. Ranganath RM (2003) Female gametophyte development in higher plants meiosis and mitosis break the cellular barrier. Plant Biol 5:42–49.CrossRefGoogle Scholar
  86. Ranganath RM (2004) Harnessing the developmental potential of nucellar cells: barriers and opportunities. Trends Biotechnol 22:504–510.PubMedCrossRefGoogle Scholar
  87. Ranganath RM (2005) Asymmetric cell divisions in flowering plants: One mother, ‘two-many’ daughters. Plant Biol 7:425–448.PubMedCrossRefGoogle Scholar
  88. Ranganath RM, Nagashree NR (2000) Selective cell elimination during microspororgenesis in sedges. Sexual Plant Reprod 13(1):53–60.CrossRefGoogle Scholar
  89. Ranganath RM, Nagashree NR (2001) Role of programmed cell death during development. Int Rev Cytol 202:159–244.PubMedCrossRefGoogle Scholar
  90. Reddy GV, Heisler MG, Ehrhardt DW, Mayerowitz EM (2004) Real-time lineage analysis reveals oriented cell divisions associated with morphogenesis at the shoot apex of Arabidopsis thaliana. Development 131:4225–4237.PubMedCrossRefGoogle Scholar
  91. Reyes JC (2006) Chromatin modifiers that control plant development. Curr Opin Plant Biol 9:21–27.PubMedCrossRefGoogle Scholar
  92. Rotman N, Durbarry A, Wardle A, Yang WC, Chaboud A, Faure J-E, Berger F, Twell D (2005) A novel class of MYB factors controls sperm-cell formation in plants. Cell 15:244–248.Google Scholar
  93. Russinova E, de Vries S (2000) Parental contribution to plant embryos. Plant Cell 12:461–464.PubMedCrossRefGoogle Scholar
  94. Sabatini S, Heidstra R, Wildwater M, Scheres B (2003) SCARECROW is involved in positioning the stem cell niche in the Arabidopsis root meristem. Genes Dev 17:354–358.PubMedCrossRefGoogle Scholar
  95. Scheres B, Benfey PN (1999) Asymmetric cell division in plants. Annu Rev Plant Physiol 50:505–537.CrossRefGoogle Scholar
  96. Scheres B, Di Laurenzio L, Willemsen V, Hauser MT, Janmaat K, Weisbeek P, Benfey PN (1995) Mutations affecting the radial organization of the Arabidopsis root display specific defects throughout the embryonic axis. Development 121:53–62.Google Scholar
  97. Schmidt ED, Guzzo F, Toonen MA, de Vries SC (1997) A leucine-rich repeat containing receptor-like kinase marks somatic plant cells competent to form embryos. Development 124:2049–2062.PubMedGoogle Scholar
  98. Sessions A, Yanofsky MF, Weigel D (2000) Cell-cell signaling and movement by the floral transcription factors LEAFY and APETALA1. Science 289:779–781.PubMedCrossRefGoogle Scholar
  99. Shani E, Yanai O, Ori N (2006) The role of hormones in shoot apical meristem function. Curr Opin Plant Biol 9:484–489.PubMedCrossRefGoogle Scholar
  100. Shen B, Li C, Min Z, Meeley RB, Tarczynski MC, Olsen O-A (2003) sal1 determines the number of aleurone cell layers in maize and encodes a class E vacuolar sorting protein. Proc Natl Acad Sci USA 100:6552–6557.PubMedCrossRefGoogle Scholar
  101. Shi D-Q, Liu J, Xiang Y-H, Ye D, Sundaresan V, Yang W-C (2005) SLOW WALKER1, essential for gametogenesis in Arabidopsis encodes a WD-40 protein involved in 18S ribosomal biogenesis. Plant Cell 17:2340–2345.PubMedCrossRefGoogle Scholar
  102. Shpak ED, McAbee JM, Pillitteri LJ, Torii KU (2005) Stomatal patterning and differentiation by synergistic interactions of receptor kinases. Science 309:290–293.PubMedCrossRefGoogle Scholar
  103. Sieburth LE, Deyholos MK (2005) Vascular development: the long and winding road. Curr Opin Plant Biol 9:48–54.PubMedCrossRefGoogle Scholar
  104. Singh MB, Bhalla PL (2006) Plant stem cells carve their own niche. Trends Plant Sci 11:241–246.PubMedCrossRefGoogle Scholar
  105. Smith-White S (1959) Pollen development patterns in Epacridaceae: a problem in cytoplasmic-nuclear interaction. Proc Linnean Soc NSW 84:8–35.Google Scholar
  106. Sprunck S, Baumann U, Edwards K, Langridge P, Dresselhaus T (2005) The transcript composition of egg cells changes significantly following fertilization in wheat (Triticum aestivum L.). Plant J 41:660–672.PubMedCrossRefGoogle Scholar
  107. Stone SL, Kwong LW, Yee KM et al. (2001) LEAFY COTYLEDON2 encodes a B3 domain transcription factor that induces embryo development. Proc Natl Acad Sci USA 98:11806–11811.PubMedCrossRefGoogle Scholar
  108. Thompson MV (2006) Phloem: the long and short of it. Trends Plant Sci 11(1):26–32.PubMedCrossRefGoogle Scholar
  109. Tsiantis M (2001) Control of shoot cell fate: beyond homeoboxes. Plant Cell 13:733–738.PubMedCrossRefGoogle Scholar
  110. Tsukaya H (2002) Leaf development. The Arabidopsis book. Doi:10.1199/tab.0072.Google Scholar
  111. Twell D, Park SK, Lalanne E (1998) Asymmetric division and cell fate determination in developing pollen. Trends Plant Sci 3(8):305–310.CrossRefGoogle Scholar
  112. van den Berg C, Willemsen V, Hege W, Weisbeek P, Scheres B (1995) Cell fate in the Arabidopsis root meristem is determined by directional signalling. Nature 378:62–65.PubMedCrossRefGoogle Scholar
  113. Verma DPS (2001) Cytokinesis and building of cell plate in plants. Ann Rev Plant Physiol 52:751–784.CrossRefGoogle Scholar
  114. Vernon DM, Meinke DW (1994) Embryogenic transformation of the suspensor in twin, a polyembryonic mutant of Arabidopsis. Dev Biol 165:566–573.PubMedCrossRefGoogle Scholar
  115. Walbot V (1994) Overview of key steps in aleurone development. In: Freeling M, Walbot V (eds) The maize handbook. Springer, Berlin Heidelberg New York, pp 78–80.Google Scholar
  116. Weigel D, Jurgens G (2002) Stem cells that make stems. Nature 415:751–754.PubMedGoogle Scholar
  117. Willemsen V, Friml J, de Vrieze G, Weisbeek P, Scheres B (1998) The HOBBIT gene is required for formation of the root meristem in the Arabidopsis embryo. Development 125:521–531.PubMedGoogle Scholar
  118. Williams L, Fletcher JC (2005) Stem cell regulation in the Arabidopsis shoot apical meristem. Curr Opin Plant Biol 8:582–586.PubMedCrossRefGoogle Scholar
  119. Wilson ZA, Yang C (2004) Plant gametogenesis: Conservation and contrasts in development. Reproduction 128:483–492.PubMedCrossRefGoogle Scholar
  120. Wysocka-Diller JW, Helariutta Y, Fukaki H, Malamy JE, Benfey PN (2000). Molecular analysis of SCARECROW function reveals a radial patterning mechanism common to root and shoot. Development 127:595–603.PubMedGoogle Scholar
  121. Xiao W, Custard KD, Brown RC et al. (2006) DNA methylation is critical for Arabidopsis embryogenesis and seed viability. Plant Cell 18:805–814.PubMedCrossRefGoogle Scholar
  122. Xu J, Scheres B (2005) Cell polarity: ROPing the ends together. Curr Opin Plant Biol 8:613–618.PubMedCrossRefGoogle Scholar
  123. Yadegari R, Drews GN (2004) Female gametophyte development. Plant Cell (Suppl) 16:S133–S141.PubMedCrossRefGoogle Scholar
  124. Yanai O, Shani E, Dolezal K, Tarkowski P, Sablowski R, Sandberg G, Samach A, Ori N (2005) Arabidopsis KNOX1 proteins activate cytokinin biosynthesis. Curr Biol 15:1566–1571.PubMedCrossRefGoogle Scholar
  125. Yang W-C, Sundaresan V (2000) Genetics of gametophyte biogenesis in Arabidopsis. Curr Opin Plant Biol 3:63–67.CrossRefGoogle Scholar
  126. Yu H-J, Hogan P, Sundaresan V (2005) Analysis of the female gametophyte transcriptome of Arabidopsis by comparative expression profiling. Plant Physiol 139:1853–1869.PubMedCrossRefGoogle Scholar
  127. Zhao C, Craig JC, Petzold HE et al. (2005) The xylem and phloem transcriptomes from secondary tissues of Arabidopsis root-hypocotyl. Plant Physiol 138:803–818.PubMedCrossRefGoogle Scholar
  128. Zipori D (2004) The nature of stem cells: state rather than entity. Nature Rev Genet 5:873–878.PubMedCrossRefGoogle Scholar
  129. Zuo J et al. (2002) The WUSCHEL gene promotes vegetative to embryonic transition in Arabidopsis. Plant J 30:349–360.PubMedCrossRefGoogle Scholar

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© Springer Berlin Heidelberg 2007

Authors and Affiliations

  • R. M. Ranganath
    • 1
  1. 1.Department of BotanyBangalore UniversityBangaloreIndia

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