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Gender-related differences in adaptability to drought stress in the dioecious tree Ginkgo biloba

文献类型： 外文期刊

作者： He, Mei 1 ; Shi, Dawei 1 ; Wei, Xiaodong 4 ; Hu, Yuan 3 ; Wang, Tao 1 ; Xie, Yinfeng 1 ;

作者机构： 1.Nanjing Forestry Univ, Coll Biol & Environm, Nanjing 210037, Jiangsu, Peoples R China

2.Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Jiangsu, Peoples R China

3.Jiangxi Acad Forestry, Nanchang 330013, Jiangxi, Peoples R China

4.Jiangsu Acad Agr Sci, Inst Food Crops, Jiangsu High Qual Rice R&D Ctr, Nanjing 2

关键词： Ginkgo biloba;Gender differences;Adaptability;Drought stress

期刊名称：ACTA PHYSIOLOGIAE PLANTARUM （ 影响因子：2.354； 五年影响因子：2.711 ）

ISSN：

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收录情况： SCI

摘要： Ginkgo (Ginkgo biloba) as a precious relict plant is cultivated around the world, and it is also a typical dioecious tree. Drought is a major environmental stress that limits the growth and development of ginkgo. Although many studies have examined the impact of drought on ginkgo, few have investigated gender-related under drought treatment in the species. In our research, we examined comparative morphology, physiology and the ultrastructure of mesophyll cell in male and female ginkgoes to determine which gender shows superior adaptability to drought stress. Two-year-old cutting-propagated male and female ginkgoes suffered to drought treatment. The experiments showed that drought significantly limited growth and development, disrupted photosynthesis, and destoried the antioxidant protection system in both male and female ginkgoes. When the gender differences in the species were compared, females showed better growth, activities of SOD and POD, concentrations of chl t, chl a/b ratio and proline, P-n, C-i, g(s), qP and NPQ under drought, but lower concentrations of H2O2 and O-2(-), and relative electrolyte leakage. In the aspect of cell ultrastructure, female plants showed a slower rate of cell breakdown and chloroplast decomposition under drought stress than males. The results indicate that female plants of ginkgo show superior growth performance and self-protective mechanisms and higher photosynthetic capacity than male plants under drought stress. Thus, we conclude that female individuals of ginkgo possess better adaptability to drought stress than male individuals.

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