Exogenous abscisic acid application during grain filling in winter wheat improves cold tolerance of offspring's seedlings
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Exogenous abscisic acid application during grain filling in winter wheat improves cold tolerance of offspring's seedlings. / Li, X.; Cai, J.; Liu, Fulai; Dai, T.; Cao, W.; Jiang, D.
In: Journal of Agronomy and Crop Science, Vol. 200, No. 6, 2014, p. 467-478.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Exogenous abscisic acid application during grain filling in winter wheat improves cold tolerance of offspring's seedlings
AU - Li, X.
AU - Cai, J.
AU - Liu, Fulai
AU - Dai, T.
AU - Cao, W.
AU - Jiang, D.
PY - 2014
Y1 - 2014
N2 - Low temperature seriously depresses seed germination and seedling growth in winter wheat (Triticum aestivum L.). In this study, wheat plants were sprayed with abscisic acid (ABA) and fluridone (inhibitor of ABA biosynthesis) at 19 days after anthesis (DAA) and repeated at 26 DAA. The seeds of those plants were harvested, and seed germination and offspring's seedling growth under low temperature were evaluated. The results showed that exogenous ABA application decreased seed weight and slightly reduced seed set and seed number per spike. Under low temperature, seeds from ABA-treated plants showed reduced germination rate, germination index, growth of radicle and coleoptile, amylase activity and depressed starch degradation as compared with seeds from non-ABA-treated plants; however, activities of the antioxidant enzymes in both germinating seeds and seedling were enhanced from those exposed to exogenous ABA, resulting in much lowered malondialdehyde (MDA) and H2O2 concentrations and O2- production rate. In addition, the maximum quantum efficiency of photosystem II was also enhanced in ABA-treated offspring's seedlings. It is concluded that exogenous ABA treatment at later grain-filling stage could be an effective approach to improve cold tolerance of the offspring during seed germinating and seedlings establishment in winter wheat.
AB - Low temperature seriously depresses seed germination and seedling growth in winter wheat (Triticum aestivum L.). In this study, wheat plants were sprayed with abscisic acid (ABA) and fluridone (inhibitor of ABA biosynthesis) at 19 days after anthesis (DAA) and repeated at 26 DAA. The seeds of those plants were harvested, and seed germination and offspring's seedling growth under low temperature were evaluated. The results showed that exogenous ABA application decreased seed weight and slightly reduced seed set and seed number per spike. Under low temperature, seeds from ABA-treated plants showed reduced germination rate, germination index, growth of radicle and coleoptile, amylase activity and depressed starch degradation as compared with seeds from non-ABA-treated plants; however, activities of the antioxidant enzymes in both germinating seeds and seedling were enhanced from those exposed to exogenous ABA, resulting in much lowered malondialdehyde (MDA) and H2O2 concentrations and O2- production rate. In addition, the maximum quantum efficiency of photosystem II was also enhanced in ABA-treated offspring's seedlings. It is concluded that exogenous ABA treatment at later grain-filling stage could be an effective approach to improve cold tolerance of the offspring during seed germinating and seedlings establishment in winter wheat.
KW - Abscisic acid
KW - Cold tolerance
KW - Germination
KW - Offspring
KW - Winter wheat (Triticum aestivum L.)
U2 - 10.1111/jac.12064
DO - 10.1111/jac.12064
M3 - Journal article
VL - 200
SP - 467
EP - 478
JO - Journal of Agronomy and Crop Science
JF - Journal of Agronomy and Crop Science
SN - 0931-2250
IS - 6
ER -
ID: 129920860