丛枝菌根和钼对小麦光合荧光特性的影响
Effects of arbuscular mycorrhiza and molybdenum on photosynthetic fluorescence characteristics of wheat
王震 1高旭硕 1张梦歌 1韦文敬 1石兆勇 1徐寿霞1
作者信息
- 1. 河南科技大学农学院,河南 洛阳 471000;河南省乡村人居环境工程中心,河南 洛阳 471000;洛阳市共生微生物与绿色发展重点实验室,河南洛阳 471000
- 折叠
摘要
利用灭菌土壤进行小麦盆栽试验,在 0、5、100、1 000 mg/kg 4 个钼含量水平,分别进行接种幼套近明球囊霉(Claroideoglomus etunicatum)和不接种对照处理,对不同钼水平下丛枝菌根(AM)对小麦光合荧光特性的响应情况进行研究.结果表明:在不同土壤钼水平下,丛枝菌根真菌(AMF)能够稳定侵染小麦,平均侵染率达58.82%;AM能够提高 4 个钼水平下小麦的净光合速率(Pn)和气孔导度(Gs);在钼质量分数为 100 mg/kg时小麦净光合速率的菌根依赖性最高,达到 698.05%;AM能够提高 4 个钼水平下小麦叶片的光系统Ⅱ最大光化学效率(Fv/Fm)、光系统Ⅱ的潜在活性(Fv/Fo)、光能吸收性能指数(PIabs)、光系统Ⅱ向下游传递电子的能力(φo)和电子传递量子产额(φEo),尤其在钼质量分数为 100 mg/kg 时,提高的幅度达显著水平.综上所述,AM 能够提高不同钼水平下小麦光合能力,改善光系统Ⅱ的整体性能,在钼质量分数为100 mg/kg时AM所发挥的作用最大.
Abstract
In this study,the responses of arbuscular mycorrhizal(AM)to photosynthetic fluorescence characteristics of wheat under different molybdenum levels were studied by inoculation with Claroideoglomus etunicatum(BEG168)and non-inoculation control at four molybdenum levels of 0,5,100,1 000 mg/kg with pot experiment using sterilized soil.The results showed that arbuscular mycorrhizal fungi(AMF)could stably infect wheat under different soil molybdenum levels,with an average infection rate of 58.82%.AM could improve the net photosynthetic rate(Pn)and stomatal conductance(Gs)of wheat under different molybdenum levels.At molybdenum 100 mg/kg,the net photosynthetic rate of wheat was the most dependent on the mycorrhizal dependence,reaching 698.05%.AM could increase the maximum photochemical efficiency of photosystem II(Fv/Fm),the potential activity of photosystem II(Fv/Fo),the light energy absorption performance index(PIabs),the ability of photosystem II to transfer electrons downstream(φo)and the quantum yield of electron transfer(φEo)in wheat leaves under different molybdenum levels,especially at molybdenum 100 mg/kg,the increase was significant.In summary,AM could increase the photosynthetic capacity of wheat under different molybdenum levels and enhance the overall performance of photosystem II,reaching the optimal outcome at the levels of 100 mg/kg.
关键词
小麦/钼/丛枝菌根/净光合速率/菌根依赖性/荧光特性Key words
wheat/molybdenum/arbuscular mycorrhizal/net photosynthetic rate/mycorrhiza dependence/fluorescence characteristics引用本文复制引用
基金项目
国家自然科学基金项目(32171620)
河南省科技攻关项目(232102111005)
出版年
2024
国家科技期刊平台
NSTL
万方数据