@Article{phyton.2021.011724,
AUTHOR = {Dabing Xiang, Wei Wei, Yan Wan, Xiaoyong Wu, Xueling Ye, Lianxin Peng, Linyun Zhong, Qi Wu, Liang Zou, Gang Zhao, Jianglin Zhao},
TITLE = {Polysaccharide Elicitor from the Endophyte <i>Bionectria</i> sp. Fat6 Improves Growth of Tartary Buckwheat under Drought Stress},
JOURNAL = {Phyton-International Journal of Experimental Botany},
VOLUME = {90},
YEAR = {2021},
NUMBER = {2},
PAGES = {461--473},
URL = {http://www.techscience.com/phyton/v90n2/41464},
ISSN = {1851-5657},
ABSTRACT = {Drought can limit the growth and reduce the yield of crops, but the safe
and effective bio-approach to improve the drought resistance of crops is very little. We conducted an experiment in which we monitored the effects of polysaccharide from the endophyte <i>Bionectria</i> sp. Fat6 on the growth of Tartary
buckwheat (<i>Fagopyrum tataricum</i> (L.) Gaertn) seedlings under control and
drought-stressed conditions by determining gas exchange, photosynthesis parameters, photosynthetic pigment contents, and metabolite accumulation. Results
indicated that the polysaccharide from endophyte stimulated plant growth and
increased the aboveground biomass, root mass, and root/shoot ratio of Tartary
buckwheat. Application of the polysaccharide to drought-stressed plants resulted
in a significant increase in the net photosynthetic rate, stomatal conductance, and
transpiration rate of Tartary buckwheat and decreased the intercellular CO<sub>2</sub> concentration. The contents of chlorophyll <i>a</i>, chlorophyll <i>b</i>, chlorophyll <i>a</i> + <i>b</i>, and
carotenoids in leaves were higher in polysaccharide-treated seedlings than that
in control. Polysaccharide notably increased the soluble protein and proline content and decreased the malondialdehyde content in Tartary buckwheat leaves. The
endophytic polysaccharide may protect Tartary buckwheat against drought by
improving leaf gas exchange and photosynthetic capacity, and altering concentrations of protective metabolites. Together, these changes may compensate for the
negative impacts of drought stress on the growth of Tartary buckwheat. Thus,
the polysaccharide from the endophyte <i>Bionectria</i> sp. Fat6 may be an effective
biotic elicitor and a promising bio-approach to improve Tartary buckwheat production worldwide.},
DOI = {10.32604/phyton.2021.011724}
}