| Autor: |
Zhan, Zhennan, Wang, Ning, Chen, Zumin, Zhang, Yanxia, Geng, Kangqi, Li, Dongmei, Wang, Zhenping |
| Předmět: |
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| Zdroj: |
Functional Plant Biology; 2023, Vol. 50 Issue 12, p993-1009, 17p |
| Abstrakt: |
Water stress can affect plant ecological distribution, crop growth and carbohydrate distribution, impacting berry quality. However, previous studies mainly focused on short-term water stress or osmotic stress and few studies paid attention to the responses of grape to long-term water stresses. Grapevines were subjected to no water stress (CK), mild water stress (T1) and moderate water stress (T2). Hundred-berry weight and malic acid content were reduced under T1 and T2; however, glucose and fructose content showed the opposite trend. Endogenous hormones and polyamines (PAs) can regulate plant growth and development as well as physiological metabolic processes. T1 and T2 could increase abscisic acid content, however, indole-3-acetic acid, jasmonate, gibberellins 3 and 4, cytokinin and trans -zeatin contents were slightly decreased. Three species of PAs (putrescine, spermidine and spermine) were detected, presenting obvious tissue specificity. Furthermore, there was a statistically positive correlation relating spermidine content in the pulp with glucose and fructose contents of grape berries; and a negative correlation with organic acid. In summary, water stress had a profound influence on hormonally-driven changes in physiology and berry quality, indicating that endogenous hormones and the PAs play a critical role in the development and ripening of grape berries under water stress. Grapevine (Vitis vinifera L.) is one of the most economically important fruit crops, with a high economic value worldwide. Most vine-growing areas globally are in temperate zones characterised by high temperatures and prolonged dry periods. Phytohormones and polyamines, as important endogenous signal mediators, regulate a plethora of metabolic processes and responses to water stress. Therefore, it is necessary to investigate the effects of water stress on hormones and free polyamines in various tissues. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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