Preliminary Study on Mechanisms of Growth Promotion in Rice Colonized by Piriformospora indica
Year: 2015
Type: article
Abstract: Piriformospora indica is a root endophytic fungus,which is able to establish beneficial symbiotic relationships with plant,and it can promote the growth of plants,enhance crop yield.In order to study the impact of P.indicaon growth and development of rice,We analyzed the differences in plant height,biomass,tillering,heading,panicle properties,chlorophyll content,nitrate reductase(NR)activity,root activity and expression of growth-related genes between nonglutinous rice colonized and un-colonized by P.indica.The results showed that the plant height,biomass of shoot,the number of tillers,root activity and NR activity of rice colonized by P.indica were significantly higher than that in un-colonized ones.Rice colonized by P.indicaheaded 4-6days earlier than the un-colonized rice.The contents of chlorophyll increased by 19.77% and 17.89% respectively after P.indica treatment for 3and 4weeks.RT-PCR analysis showed that the expression of auxin-regulated genes OsIAA13 and YUCCA were up-regulated in leaves of rice colonized by P.indica,being 1.49 and 1.30 folds as high as that of control plants.The expression of NRR,which negatively regulates the growth of rice,was 58% as high as that of control plants.The results indicated that the growth promotion of rice conferred by P.indica was relevant to chlorophyll content,NR activity,root activity and expression of growth-related genes.P.indica may promote the growth of rice through improving photosynthetic rate,enhancing mineral nutrition absorption and utilization and inducing auxin secretion.
Source: Zhongguo shuidao kexue
Author: WU Jin-da
Institution: Zhejiang University
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W2393538567