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Changes in gas exchange, root growth, and biomass accumulation of Platycladus orientalis seedlings colonized by Serendipita indica

作  者:
Chu Wu;Wei Qiao;Jing Deng;Wenying Zhan
单  位:
Institute of Root Biology, Yangtze University, Jingzhou, People’s Republic of China;College of Agricultural Sciences, Yangtze University, Jingzhou, People’s Republic of Chin;College of Agricultural Sciences, Yangtze University, Jingzhou, People’s Republic of China
关键词:
Biomass;Net CO2 assimilation;Serendipita indica;Root growth;Symbiosis;ARBUSCULAR MYCORRHIZAL FUNGI;ENDOPHYTE PIRIFORMOSPORA-INDICA;DOUGLAS-FIR SEEDLINGS;PLANT-GROWTH;CHLOROPHYLL FLUORESCENCE;PHYSIOLOGICAL-CHARACTERISTICS;LACCARIA-BICOLOR;PROMOTES GROWTH;DROUGHT STRESS;MAIZE PLANT
摘  要:
Serendipita indica (formerly known as Piriformospora indica), a root endophytic fungus, exhibits multiple functions in some agricultural, horticultural, and medicinal plant species. We studied colonization of the roots of Platycladus orientalis, a forest tree species, by S. indica to improve the quality of the seedlings in seedbeds and survival rates in sylviculture. At 20days after inoculation, S. indica colonized the root cortex of P. orientalis seedlings. Root colonization by S. indica significantly increased net CO2 assimilation, light use efficiency, and biomass accumulation by both roots and shoots, whereas it did not affect the biomass allocation between roots and shoots. In addition, the symbiosis significantly increased root total length, surface area, and volume. In view of the two specific traits of S. indica, i.e., axenic culture and wide colonization in plants, the fungus might be used for improving quality of P. orientalis seedlings and increasing their survival after transplanting.

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