Journal
MOLECULES
Volume 26, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/molecules26041192
Keywords
melatonin; Triticum aestivum; low temperature; germination; carbohydrate metabolism
Funding
- National Natural Science Foundation of China [31701362]
- National Natural Science Fund for Excellent Young Scholars [31922064]
- CAS Pioneer Hundred Talents Program [C08Y194]
- Science & Technology Development Program of Jilin Province [20190201118JC]
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Seed pre-soaking and parental treatment with melatonin improve wheat tolerance to low temperatures by increasing germination rates and antioxidant enzyme activity.
Low temperatures seriously depress germination and seedling establishment in wheat and it is of great significance to explore approaches to improve wheat tolerance to low temperatures. In this study, the effects of seed pre-soaking and parental treatment with melatonin on seed germination and low temperature tolerance during the early growing stage in wheat were studied. The results showed that pre-soaking with melatonin increased the germination rate, improved antioxidant capacity and accelerated starch degradation under low temperature, which alleviated low temperature-induced damage to the chloroplasts in coleoptiles of wheat seedlings. Parental melatonin treatment during grain filling stage significantly decreased the grain weight. Seeds from parental melatonin-treated plants showed higher germination rates and higher antioxidant enzyme activity than the control seeds under low temperature. In addition, parental treatment with melatonin modulated the activities of carbohydrate metabolism enzymes, which contributes to enhanced low temperature tolerance in wheat offspring. It was suggested that both seed pre-soaking and parental treatment with melatonin could be the effective approaches for low temperature tolerance induction in wheat.
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