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Drought-induced alterations in photosynthetic, ultrastructural and biochemical traits of contrasting sugarcane genotypes

文献类型： 外文期刊

作者： Zhang, Yue-Bin 1 ; Yang, Shao-Lin 2 ; Dao, Jing-Mei 2 ; Deng, Jun 2 ; Shahzad, Ahmad Naeem 3 ; Fan, Xian 2 ; Li, Ru-Dan 2 ; Quan, Yi-Ji 2 ; Bukhari, Syed Asad Hussain 2 ; Zeng, Zhao-Hai 1 ;

作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, Beijing, Peoples R China

2.Yunnan Acad Agr Sci, Sugarcane Res Inst, Kaiyuan, Yunnan, Peoples R China

3.Bahauddin Zakariya Univ, Dept Agron, Multan, Pakistan

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2020 年 15 卷 7 期

页码：

收录情况： SCI

摘要： Drought is an important factor which limits growth of sugarcane. To elucidate the physiological and biochemical mechanisms of tolerance, a pot experiment was conducted at Sugarcane Research Institute, Kaiyuan, China. Two genotypes (Yuetang 93-159-sensitive and Yunzhe 05-51-tolerant), were subjected to three treatments; 70 +/- 5% (control), 50 +/- 5% (moderate drought) and 30 +/- 5% (severe drought) of soil field capacity. The results demonstrated that drought induced considerable decline in morpho-physiological, biochemical and anatomical parameters of both genotypes, with more pronounced detrimental effects on Yuetang 93-159 than on Yunzhe 05-51. Yunzhe 05-51 exhibited more tolerance by showing higher dry biomass, photosynthesis and antioxidant enzyme activities. Compared with Yuetang 93-159, Yunzhe 05-51 exhibited higher soluble sugar, soluble protein and proline contents under stress. Yunzhe 05-51 illustrated comparatively well-composed chloroplast structure under drought stress. It is concluded that the tolerance of Yunzhe 05-51 was attributed to improved antioxidant activities, osmolyte accumulation and enhanced photosynthesis. These findings may provide valuable information for future studies on molecular mechanism of tolerance.

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