| Growth promotion and tolerance improvement to drought stress of cotton seedling conferred by Piriformospora indica |
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| DOI：10.7606/j.issn.1000-7601.2019.05.36 |
| Key Words: cotton Piriformospora indica symbiosis drought stress growth photosynthesis drought tolerance |
| Author Name | Affiliation | | PAN Rui | Research Center of CropStress Resistance Technologies, Yangtze University,Jingzhou, Hubei 434025, China | | DENG Jing | Research Center of CropStress Resistance Technologies, Yangtze University,Jingzhou, Hubei 434025, China | | HU Ai-bing | Cotton Research Institute, Jingzhou Academy of Agricultural Sciences, Jingzhou, Hubei 434000, China | | ZHANG Wen-ying | Research Center of CropStress Resistance Technologies, Yangtze University,Jingzhou, Hubei 434025, China |
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| Abstract: |
| A drought sensitive cotton variety,Shayang 505-3A, was inoculated with Piriformospora indica for the experiment, and the plant height, stem diameter, leaf area, net photosynthesis rate (Pn), stomatal conductance (Gs), intercellular CO2 concentration (Ci), and transpiration rate (Tr) were measured at 20 days of the growth. The plant height, stem diameter, root parameters, leaf temperature, leaf reflectance and MDA content were collected after the treatments of natural drought and PEG-6000 (15% and 20%) induced drought. The results showed that the plant height, stem diameter, leaf area of cotten seedlings were significantly increased by 32.4%,15.8% and 20.5% after inoculated with Piriformospora indica, and Pn, Gs, Ci and Tr were increased by 29.1%, 55.9%, 20.1% and 51.1%, respectively. After drought treatment, the plant height and stem diameter of plants inoculated with Piriformospora indica decreased by 14.1% and 5.3%, respectively, while that of non-inoculated plants decreased by 23.3% and 8.7%, respectively. The total root length, total root surface area, root volume and root tip number increased by 9.6%, 9.9%, 3.8% and 21.3%, respectively, while the non-inoculated plants increased by 11%, 27.7%, 12.2%, and the number of root tips decreased by 5.2%. Moreover, the leaf temperature and MDA content increased by 0.34℃ and 9.9%, respectively, while the non-inoculated plants increased 0.97℃ and 19.1%, respectively. The results indicated that inoculation with Piriformospora indica promoted the growth of cotton seedlings and induced the drought tolerance of cotton by improving morphology of plant root and maintaining normal physiological metabolism. |
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