Phosphorus and carbohydrate metabolism contributes to low phosphorus tolerance in cotton

被引：0
作者：
Asif Iqbal
Dong Qiang
Wang Xiangru
Gui Huiping
Zhang Hengheng
Zhang Xiling
Song Meizhen
机构：
[1] Zhengzhou University,State Key Laboratory of Cotton Biology, Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Zhengzhou Research Base, School of Agricultural Sciences
[2] State Key Laboratory of Cotton Biology,undefined
[3] Department of Agriculture,undefined
[4] Hazara University,undefined
[5] Western Agricultural Research Center of Chinese Academy of Agricultural Sciences,undefined
来源：
BMC Plant Biology | / 23卷
关键词：
Cotton; Low phosphorus tolerance; Root morphology; Carbohydrate accumulation, phosphorus metabolism;
D O I：
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学科分类号：
摘要：
Low phosphorus (P) is one of the limiting factors in sustainable cotton production. However, little is known about the performance of contrasting low P tolerant cotton genotypes that might be a possible option to grow in low P condition. In the current study, we characterized the response of two cotton genotypes, Jimian169 a strong low P tolerant, and DES926 a weak low P tolerant genotypes under low and normal P conditions. The results showed that low P greatly inhibited growth, dry matter production, photosynthesis, and enzymatic activities related to antioxidant system and carbohydrate metabolism and the inhibition was more in DES926 as compared to Jimian169. In contrast, low P improved root morphology, carbohydrate accumulation, and P metabolism, especially in Jimian169, whereas the opposite responses were observed for DES926. The strong low P tolerance in Jimian169 is linked with a better root system and enhanced P and carbohydrate metabolism, suggesting that Jimian169 is a model genotype for cotton breeding. Results thus indicate that the Jimian169, compared with DES926, tolerates low P by enhancing carbohydrate metabolism and by inducing the activity of several enzymes related to P metabolism. This apparently causes rapid P turnover and enables the Jimian169 to use P more efficiently. Moreover, the transcript level of the key genes could provide useful information to study the molecular mechanism of low P tolerance in cotton.
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