Piriformospora indica symbiosis improves water stress tolerance of rice through regulating stomata behavior and ROS scavenging systems

被引:81
作者
Tsai, Hsuan-Ju [1 ]
Shao, Ko-Hsuan [1 ]
Chan, Ming-Tsair [2 ,3 ]
Cheng, Chiu-Ping [4 ]
Yeh, Kai-Wun [4 ]
Oelmueller, Ralf [5 ]
Wang, Shu-Jen [1 ]
机构
[1] Natl Taiwan Univ, Dept Agron, Taipei, Taiwan
[2] Acad Sinica, Biotechnol Ctr Southern Taiwan, Tainan, Taiwan
[3] Acad Sinica, Agr Biotechnol Res Ctr, Taipei, Taiwan
[4] Natl Taiwan Univ, Inst Plant Biol, Taipei, Taiwan
[5] Friedrich Schiller Univ Jena, Matthias Schleiden Inst, Plant Physiol, Jena, Germany
关键词
Rice (Oryza sativa L.); Piriformospora indica; water stress; stomata; oxidative stress; CONFERS DROUGHT TOLERANCE; ROOT ENDOPHYTIC FUNGUS; SUPEROXIDE-DISMUTASE; PLANT-GROWTH; GLUTATHIONE-REDUCTASE; HYDROGEN-PEROXIDE; OXIDATIVE STRESS; ABIOTIC STRESS; GRAIN-YIELD; OXYGEN;
D O I
10.1080/15592324.2020.1722447
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Global water shortage seriously threatens rice growth especially in irrigated production areas. Association of plants with beneficial soil microbes is one strategy for plant adaption to environmental stresses. In this study, rice (Oryza sativa L.) plants were colonized by the beneficial root-colonizing endophytic fungus Piriformospora indica (P. indica). We demonstrate that grain yield were higher in P. indica-colonized rice plants compared to the uncolonized plants grown in soil. Moreover, P. indica effect on improving water stress tolerance in rice and its physiological mechanism were investigated in a hydroponic culture system. Polyethylene glycol (PEG) was applied to the culture solution to conduct the water stress condition. Water stress-induced leaf wilting and impairments in photosynthetic efficiency were diminished in P. indica-colonized plants. Furthermore, P. indica colonization promotes stomata closure and increases the leaf surface temperature under water stress. The malondialdehyde level (as an indicator for oxidative stress) was lower and the reduced to oxidized glutathione ratio was higher in P. indica-colonized and PEG-exposed rice plants compared to the uncolonized plants. Furthermore, the activities of the antioxidant enzymes catalase and glutathione reductase were up-regulated in inoculated rice seedlings under water stress. In conclusion, P. indica promotes rice performance under water stress by stomata closure and lower oxidative stress.
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页数:10
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