Abstract
Shoot elongation of Hancornia speciosa, an endangered tree from the Brazilian savannah “Cerrado”, is very slow, thus limiting nursery production of plants. Gibberellins (GAs) A1, A3, and A5, and two inhibitors of GA biosynthesis, trinexapac-ethyl and ancymidol were applied to shoots of Hancornia seedlings. GA1 and GA3 significantly stimulated shoot elongation, while GA5 had no significant effect. Trinexapac-ethyl and ancymidol, both at 100 µg per seedling, inhibited shoot elongation up to 45 days after treatment, though the effect was statistically significant only for ancymidol. Somewhat surprisingly, exogenous GA3 more effectively stimulated shoot elongation in SD-grown plants, than in LD-grown plants. The results from exogenous application of GAs and inhibitors of GA biosynthesis imply that Hancornia shoot growth is controlled by GAs, and that level of endogenous growth-active GAs is likely to be the limiting factor for shoot elongation in Hancornia. Application of GAs thus offer a practical method for nursery production of Hancornia seedlings for outplanting into the field.





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Adams R, Kerber E, Pfister K, Weiler EW (1992) Studies on the action of the new growth retardant CGA 163935 (Cimectacarb). In: Karssen CM, van Loon LC, Vreugdenhil D (eds) Progress in plant growth regulation. Kluwer, Dordrecht, pp 818–827
Correa MP (1978) Dicionario das plantas uteis do Brasil e das exóticas cultivadas, vol 5. Ministerio da Agricultura, Rio de Janeiro
Da Silva JMC, Bates JM (2002) Biogeographic patterns and conservation in the South American Cerrado: a tropical savanna hotspot. BioScience 52:225–233
Dahanayake SR, Galwey NW (1999) Effects of interactions between low-temperature treatments, gibberellin (GA3) and photoperiod on flowering and stem height of spring rape (Brassica napus var. annua). Ann Bot 84:321–327
Durley RC, Railton ID, Pharis RP (1973) Interconversion of gibberellin A5 to gibberellin A3 in seedlings of dwarf Pisum sativum. Phytochemistry 12:1609–1612
Eriksson ME, Israelsson M, Olsson O, Moritz T (2000) Increased gibberellin biosynthesis in transgenic trees promotes growth, biomass and xylem fiber length. Nat Biotechnol 18:784–788
Franco AC (2002) Ecophysiology of woody plants. In: Oliveira OS, Marquis RJ (eds) The Cerrados of Brazil: ecology and natural history of a Neotropical savanna. Columbia University Press, New York, pp 178–197
Fujioka S, Yamane H, Spray CR, Phinney BO, Gaskin P, Macmillan J, Takahashi N (1990) Gibberellin A3 is biosynthesized from gibberellin A20 via gibberellin A5 in shoots of Zea mays L. Plant Physiol 94:127–131
Griggs DL, Hedden P, Temple-Smith KE, Rademacher W (1991) Inhibition of gibberellin 2β-hydroxylases by acylcyclohexanedione derivatives. Phytochem 30:2513–2517
Hedden P, Croker SJ (1992) Regulation of gibberellin biosynthesis in maize seedlings. In: Karssen CM, van Loon LC, Vreugdenhil D (eds) Progress in plant growth regulation. Kluwer, Dordrecht, pp 534–544
Hisamatsu T, Koshioka M, Kubota S, King RW, Mander LN (2000a) Flower promotion of Matthiola incana (L.) R. Br. by gibberellin biosynthesis inhibitory acylcyclohexanediones. Acta Hort 515:33–38
Hisamatsu T, Koshioka M, Kubota S, Fujime Y, King RW, Mander LN (2000b) The role of gibberellin biosynthesis in the control of growth and flowering in Matthiola incana. Physiol Plant 109:97–105
Hoffmann WA (2000) Post-establishment seedling success in the Brazilian Cerrado: a comparison of savanna and forest species. Biotropica 32:62–69
Jones RL (1973) Gibberellins: their physiological role. Ann Rev Plant Physiol 24:571–598
Kende H, Zeevaart JAD (1997) The five ‘‘classical’’ plant hormones. Plant Cell 9:1197–1210
Klink CA, Machado RB (2005) Conservation of the Brazilian Cerrado. Conserv Biol 19:707–713
Mendonça R, Felfili JM, Walter BM, Silva MC, Rezende AV, Filgueiras TS, Nogueira PEN (1998) Flora vascular do Cerrado. In: Sano SM, Almeida SP (eds) Cerrado: ambiente e flora. EMBRAPA-CPAC, Planaltina, p 556
Moritz T, Monteiro AM (1994) Analysis of endogenous gibberellins and gibberellin metabolites from Dalbergia dolichopetala by gas chromatography–mass spectrometry and high-performance liquid chromatography–mass spectrometry. Planta 193:1–8
Moura NF, Chaves LJ, Vencovsky R, Zucchi MI, Pinheiro JB, De Morais LK, Moura MF (2005) Selection of RAPD markers to study genetic structure of Hancornia speciosa Gomez. Biosci J 21:119–125
Myers N, Mittermeier RA, Mittermeier CG, Da Fonseca GAB, Kent J (2000) Biodiversity hotspots for conservation priorities. Nature 403:853–858
Nakayama I, Miyazawa T, Kobayashi M, Kamiya Y, Abe H, Sakurai A (1991) Studies on the action of the plant growth regulators BX-112, DOCHC, and DOCHC-Et. In: Takahashi N, Phinney BO, MacMillan J (eds) Gibberellins. Springer, New York, pp 311–319
Parente TV, Borgo LA, Machado JWB (1985) Características fisico-quimicas de frutos de mangaba (Hancornia speciosa Gom.) do cerrado da regiao geoeconomica do Distrito Federal. Cien Cult 37:95–98
Poole AT, Ross JJ, Lawrence NL, Reid JB (1995) Identification of gibberellin A4 in Pisum sativum L. and the effects of applied gibberellins A9, A4, A5 and A3 on the le mutant. Plant Growth Regul 16:257–262
Rademacher W (2000) Growth retardants: effects on gibberellin biosynthesis and other metabolic pathways. Ann Rev Plant Physiol Plant Mol Biol 51:501–531
Silva JF, Farinas MR, Felfili JM, Klink CA (2006) Spatial heterogeneity, land use and conservation in the Cerrado region of Brazil. J Biogeogr 33:536–548
Tan ZG, Qian YL (2003) Light intensity affects gibberellic acid content in Kentucky bluegrass. HortScience 38:113–116
Wolbang CM, Chandler PM, Smith JJ, Ross JJ (2004) Auxin from the developing inflorescence is required for the biosynthesis of active gibberellins in barley stems. Plant Physiol 134:769–776
Yamaguchi S (2008) Gibberellin metabolism and its regulation. Ann Rev Plant Biol 59:225–251
Zeevaart JAD, Gage DA, Talon M (1993) Gibberellin A1 is required for stem elongation in spinach. PNAS, USA 90:7401–7405
Acknowledgments
The authors thank Conselho Nacional de Pesquisa e Desenvolvimento-Brazil/PRONEX “Ecofisiologia de Plantas Nativas do Cerrado” for providing financial support and nurseries of the Forestry Department and of Fazenda Água Limpa (University of Brasilia) for providing technical support.
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Communicated by O. Junttila.
L. S. Caldas: in memorium.
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Caldas, L.S., de Lima Machado, L., Caldas, S.C. et al. Growth-active gibberellins overcome the very slow shoot growth of Hancornia speciosa, an important fruit tree from the Brazilian “Cerrado”. Trees 23, 1229–1235 (2009). https://doi.org/10.1007/s00468-009-0361-9
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DOI: https://doi.org/10.1007/s00468-009-0361-9

