Effect of water stress on citrus physiological characteristics, jasmine acid biosynthesis and correlative gene expression

Shenxi Xie, Zhao Xiaoli, Xiaopeng Lu, Chengneng Huang, Yuming Xiao, Jing Li
Citrus is one of the most popular fruit crops in south part of China. Water deficit is a serious environmental stress that affects citrus growth, fruit production and quality. The objective of this study was to quantify the effects of water deficit stress on proline, soluble sugars content and jasmine acid (JA) biosynthesis and correlative gene expression in endogenous JA biosynthesis in 'Yamasitaka' (Citrus unshiu Marc) and 'Newhall' navel orange (Citrus sinensis (L.) Osbeck). Results show that accumulation of JA, content of proline and soluble sugar were significantly increased by water stress, however, content of chlorophyll decreased with increasing water stress. Real-time quantitative PCR, used to analyze correlative gene expression in endogenous JA biosynthesis, showed that CitAOS expression gradually increased with water stress. There was a significant positive relationship between content of JA and CitAOS, which indicated that CitAOS may play a more important role than the genes involved in JA biosynthesis in citrus.
Xie, Shenxi, Xiaoli, Zhao, Lu, Xiaopeng, Huang, Chengneng, Xiao, Yuming and Li, Jing (2016). Effect of water stress on citrus physiological characteristics, jasmine acid biosynthesis and correlative gene expression. Acta Hortic. 1112, 247-254
DOI: 10.17660/ActaHortic.2016.1112.34
https://doi.org/10.17660/ActaHortic.2016.1112.34
citrus, water stress, jasmine acid (JA), gene expression
English

Acta Horticulturae