Abstract
Leaf sheaths of higher position leaves (upper leaf sheaths) on rice (Oryza sativa L.) stems function as temporary starch storage organs at the pre-heading stage. Starch is quickly accumulated in upper leaf sheaths before heading, but the storage starch is degraded at the post-heading stage to provide the carbon source for developing grains. Abscisic acid (ABA) is a key plant hormone to control plant development and stress responses. This study found that ABA content in upper leaf sheaths was significantly increased at the stage after panicle exsertion and that the pattern of ABA increase was negatively correlated with changes in starch content. Exogenous ABA reduced starch content in leaf sheaths while the activities of starch degradation enzymes (i.e., α-amylase/EC 3.2.1.1, β-amylase/EC 3.2.1.2) increased in ABA-treated leaf sheaths and sucrose transporter gene expression was up-regulated. However, ABA repressed the activities of some starch biosynthesis enzymes (i.e., ADP-glucose pyrophosphorylase/EC 2.7.7.27, granule-bound starch synthase/EC 2.4.1.11) in leaf sheaths. These results suggest that ABA plays an important role in promoting starch degradation and sucrose remobilization in upper leaf sheaths at the post-heading stage.
Similar content being viewed by others
Abbreviations
- ABA:
-
Abscisic acid
- AGPase:
-
ADP-glucose pyrophosphorylase
- DAH:
-
Days after heading
- GA:
-
Gibberellic acid
- GBSS:
-
Granule-bound starch synthase
- SBE:
-
Starch branching enzyme
- SS:
-
Starch synthase
- SSS:
-
Soluble starch synthase
- SUT:
-
Sucrose transporter
References
Ahmadi A, Baker DA (1999) Effects of abscisic acid (ABA) on grain filling processes in wheat. Plant Grow Reg 28:187–197
Akihiro T, Mizuno K, Fujimura T (2005) Gene expression of ADP—glucose pyrophosphorylase and starch contents in rice cultured cells are cooperatively regulated by sucrose and ABA. Plant Cell Physiol 46:937–946
Aloni B, Daie J, Wyse RE (1986) Enhancement of [14C] sucrose export from source leaves of Vicia faba by gibberellic acid. Plant Physiol 82:962–966
Aoki N, Hirose T, Scofield GN, Whitfeld PR, Furbank RT (2003) The sucrose transporter gene family in rice. Plant Cell Physiol 44:223–232
Bergmeyer HU, Bernt E, Schmidt F, Stork H (1974) d-Glucose: determination with hexokinase and glucose-6-phosphate dehydrogenase. In: Bergmeyer HU (ed) Methods of Enzymatic Analysis, 2nd edn. Verlag Chemie, Weinheim, Academic Press, New York, pp 1196–1201
Blum A, Sinmena B, Mayer J, Golan G, Shpiler L (1994) Stem reserve mobilization supports wheat-grain filling under heat stress. Aust J Plant Physiol 21:771–781
Chen HJ, Wang SJ (2008) Molecular regulation of sink-source transition in rice leaf sheaths during the heading period. Acta Physiol Plant 30:639–649
Chen HJ, Chen JY, Wang SJ (2008) Molecular regulation of starch accumulation in rice seedling leaves in response to salt stress. Acta Physiol Plant 30:135–142
Chen JY, Liu SL, Siao W, Wang SJ (2010) Hormone and sugar effects on rice sucrose transporter OsSUT1 expression in germinating embryos. Acta Physiol Plant 32:749–756
Chincinska IA, Liesche J, Krügel U, Michalska J, Geigenberger P, Grimm B, Kühn C (2008) Sucrose transporter StSUT4 from potato affects flowering, tuberization, and shade avoidance response. Plant Physiol 146:515–528
Chu C, Lee TM (1989) The relationship between ethylene biosynthesis and chilling tolerance in seedlings of rice (Oryza sativa L.). Bot Bull Acad Sin 30:263–273
Cock JH, Yoshida S (1972) Accumulation of 14C-labelled carbohydrate before flowing and its subsequent redistribution and respiration in the rice plant. Proc Crop Sci Soc Jpn 41:226–234
Daie J (1986) Hormone-mediated enzyme activity in source leaves. Plant Grow Reg 4:287–291
Gomez-Cadenas A, Verhey SD, Holapp LD, Shen Q, Ho TH, Walker-Simmons MK (1999) An abscisic acid-induced protein kinase, PKABA1, mediates abscisic acid-suppressed gene expression in barley aleurone layers. Proc Natl Acad Sci USA 96:1767–1772
Harms K, Wöhner RV, Schulz B, Frommer WB (1994) Isolation and characterization of P-type H(+)-ATPase genes from potato. Plant Mol Biol 26:979–988
Ishikawa T, Akita S, Li Q (1993) Relationship between contents of non-structural carbohydrates before panicle initiation stage and grain yield in rice (Oryza sativa L.). Jpn J Crop Sci 62:130–131
Jacobsen JV, Hanson AD, Chandler PC (1986) Water stress enhances expression of an alpha-amylase gene in barley leaves. Plant Physiol 80:350–359
Jie W, Dashi Y, XinHong G, Xuanming L (2009) Arabidopsis AMY1 expressions and early flowering mutant phenotype. Biochem Mol Biol Rep 42:101–105
Kashem MA, Hori H, Itoh K, Hayakawa T, Todoroki Y, Hirai N, Ohigashi H, Mitsui T (1998) Effects of (+)-8′,8′,8′-trifluoroabscisic acid on alpha-amylase expression and sugar accumulation in rice cells. Planta 205:319–326
Lao NT, Schoneveld O, Mould RM, Hibberd JM, Gray JC, Kavanagh TA (1999) An Arabidopsis gene encoding a chloroplast-targeted beta-amylase. Plant J 20:519–527
Martínez-Cortina C, Sanz A (1993) Effect of hormone on sucrose uptake and on ATPase activity of Citrus sinensis L. Osbeck leaves. Ann Bot 73:331–335
Mizuno K, Kawasaki T, Shimada H, Satoh H, Kobayashi E, Okumura S, Arai Y, Baba T (1993) Alteration of the structural properties of starch components by the lack of an isoform of starch branching enzyme in rice seeds. J Biol Chem 268:19084–19091
Nakamura Y, Yuki K, Park S, Ohya T (1989) Carbohydrate metabolism in the developing endosperm of rice grains. Plant Cell Physiol 30:833–839
Nakamura Y, Takeichi T, Kawaguchi K, Yamanouchi H (1992) Purification of two forms of starch branching enzyme (Q-enzyme) from developing rice endosperm. Physiol Plant 84:329–335
Orzechowski S (2008) Starch metabolism in leaves. Acta Biochim Pol 55:435–445
Perez CM, Palmiano EP, Baun LC, Juliano BO (1971) Starch metabolism in the leaf sheaths and culm of rice. Plant Physiol 47:404–408
Saftner RA, Wyse RE (1984) Effect of plant hormones on sucrose uptake by sugar beet root tissue discs. Plant Physiol 74:951–955
Samonte SOPB, Wilson LT, McClung AM, Tarpley L (2001) Seasonal dynamics of nonstructural carbohydrate partitioning in fifteen diverse rice (Oryza sativa L.) genotypes. Crop Sci 41:902–909
Smith AM, Zeeman SC, Smith SM (2005) Starch degradation. Annu Rev Plant Biol 56:73–98
Sperotto RA, Ricachenevsky FK, Duarte GL, Boff T, Lopes KL, Sperb ER, Grusak MA, Fett JP (2009) Identification of up-regulated genes in flag leaves during rice grain filling and characterization of OsNAC5, a new ABA-dependent transcription factor. Planta 230:985–1002
Tanaka N, Fujita N, Nishi A, Satoh H, Hosaka Y, Ugaki M, Kawasaki S, Nakamura Y (2004) The structure of starch can be manipulated by changing the expression levels of starch branching enzyme IIb in rice endosperm. Plant Biotechnol J 2:507–516
Tang C, Huang D, Yang J, Liu S, Sakr S, Li H, Zhou Y, Qin Y (2010) The sucrose transporter HbSUT3 plays an active role in sucrose loading to laticifer and rubber productivity in exploited trees of Hevea brasiliensis (para rubber tree). Plant Cell Environ 33:1708–1720
Tsai CY (1973) The activities of maize a-1,4 glucan glucosyltransferases in vitro. Bot Bull Acad Sin 14:125–135
Tsai CY (1974) The function of the Waxy locus in starch synthesis in maize endosperm. Biochem Genet 11:83–96
Wang SM, Lue WL, Eimert K, Chen J (1996) Phytohormone-regulated beta-amylase gene expression in rice. Plant Mol Biol 31:975–982
Wang SJ, Liu LF, Chen CK, Chen LW (2006) Regulations of granule-bound starch synthase I gene expression in rice leaves by temperature and drought stress. Biol Plant 50:537–541
Xia H, Yandeau-Nelson M, Thompson DB, Guiltinan MJ (2011) Deficiency of maize starch-branching enzyme I results in altered starch fine structure, decreased digestibility and reduced coleoptile growth during germination. BMC Plant Biol 11:95
Yang J, Zhang J, Wang Z, Zhu Q, Wang wei (2001) Hormonal changes in the grains of rice subjected to water stress during grain filling. Plant Physiol 127:315–323
Yang J, Zhang J, Wang Z, Zhu Q (2003) Hormones in the grains in relation to sink strength and postanthesis development of spikelets in rice. Plant Grow Regul 41:185–195
Yang J, Zhang J, Wang Z, Xu G, Zhu Q (2004) Activities of key enzymes in sucrose-to-starch conversion in wheat grains subjected to water deficit during grain filling. Plant Physiol 135:1621–1629
Acknowledgments
This research was supported by Grant 96-2313-B-002-033-MY3 from the National Science Council of Taiwan.
Author information
Authors and Affiliations
Corresponding author
Additional information
Communicated by J.-H. Liu.
Rights and permissions
About this article
Cite this article
Chen, HJ., Wang, SJ. Abscisic acid enhances starch degradation and sugar transport in rice upper leaf sheaths at the post-heading stage. Acta Physiol Plant 34, 1493–1500 (2012). https://doi.org/10.1007/s11738-012-0947-5
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11738-012-0947-5