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| 1 | Microalgae Improve the Photosynthetic Performance of Rice Seedlings(Oryza sativa L.)under Physiological Conditions and Cadmium Stress显示文摘The aim of this study was to assess the impact of the microalgae Chlorella vulgaris on the rice seedlings at physiological conditions and under cadmium(Cd)stress.We examined the effects of C.vulgaris in the nutrient solution on rice seedlings grown hydroponically in the presence and the absence of 150μM CdCl2,using the low(77 K)temperature and pulse amplitude modulated(PAM)chlorophyll fluorescence,P700 photooxidation measurements,photochemical activities of both photosystems,kinetic parameters of oxygen evolution,oxidative stress markers(MDA,H_(2)O_(2) and proline),pigment content,growth parameters and Cd accumulation.Data revealed that the application C.vulgaris not only stimulates growth and improves the functions of photosynthetic apparatus under physiological conditions,but also reduces the toxic effect of Cd on rice seedlings.Furthermore,the presence of the green microalgae in the nutrient solution of the rice seedlings during Cd exposure,signifi-cantly improved the growth,photochemical activities of both photosystems,the kinetic parameters of the oxygen-evolving reactions,pigment content and decreased lipid peroxidation,H_(2)O_(2) and proline content.Data showed that the alleviation of Cd-induced effects in rice seedlings is a result of the Cd sorption by microalgae,as well as the reduced Cd accumulation in the roots and its translocation from the roots to the shoots. | Ekaterina Yotsova Martin Stefanov Georgi Rashkov Margarita Kouzmanova Anelia Dobrikova Emilia Apostolova | 2022 | Phyton-International Journal of Experimental Botany2022，91，7： | 0 |
| 2 | 根际微生物介导的植物响应干旱胁迫机制研究进展显示文摘干旱作为目前全球农业生产面临的自然灾害之一,严重制约着粮食安全和农业可持续发展。仅仅依赖于植物自身应对干旱的生理响应开发作物抗旱策略是远远不够的。关注干旱胁迫下适应性微生物的定殖以及微生物对植物的有益协助,对改善植物生长并提高作物抗旱能力具有重要的指导意义。其中,与植物紧密互作的根际微生物在植物健康发育和胁迫耐受性方面发挥着重要作用,具备良好的应用潜力。本文总结了干旱胁迫对植物根际微生物群落多样性及组成的影响,发现放线菌、厚壁菌以及丛枝菌根真菌在干旱下出现明显富集;剖析了根际相关微生物协助植物抵御干旱胁迫的机制,包括分泌植物生长调节因子、合成ACC脱氨酶、产生胞外多糖以及增强植物抗氧化酶活性等方式,以期挖掘与植物高抗旱能力相关的潜在微生物并充分发挥其作用。最后,本文提出未来不仅应该加大对植物耐旱野生近缘种的开发利用,探寻与之存在有益协作关系的微生物来源并加以恢复,还应从管理和调控植物微生物组的角度充分发挥植物根际微生物组在增强作物抗旱性中的作用,为全球气候变暖背景下的可持续农业应用提供新思路。 | 曹亚静 赵美丞 郑春燕 朱峰 | 2023 | 中国生态农业学报(中英文)2023，31，8： | 0 |
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