Effect Of Drought Stress On C.hlorophyll Fluorescence, And Biomass P ortioning Of Aegilops Tauschii L
文献类型: 外文期刊
作者: Li, X.;Cui, H.;Abbas, A.;Yu, H.
作者机构:
关键词: growth biomass; abiotic stress; Aegilops tauschii and field capacity; photosynthetic activity; water stress and mechanism of Aegilops tauschii
期刊名称: APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH
ISSN: 1589-1623
年卷期: 2019 年 17 卷 1.0 期
页码:
收录情况: JCR(2021版)
摘要: Aegilops tauschii Coss. is one of the problematic weeds, which competes for resources in wheat crop. Drought stress affects productivity, growth, and development of the crops. A greenhouse experiment was conducted to evaluate the effect of different field capacity levels on biomass partitioning and chlorophyll fluorescence on Aegilops tauschii population of China. Dry biomass, plant height, leaf area (LA), leaf area ratio (LAR), specific leaf area (SLA), and the root-shoot ratio (RSR) fluctuated under different field capacity levels and decreased with increasing drought stress level. Maximum dry biomasses, plant height (1.71 g and 15.6 cm) were observed in 70-80% field capacity while the minimum (0.70 g and 12.7 cm) were observed under 10-20% field capacity (FC) level. In root-shoot ratio maximum (0.72 g) was observed in 50-60% field capacity level while minimum (0.60 g) was observed under 1020% field capacity level. Similarly, in LAR and SLA the maximum values (111.67 cm, 175.45 cm and 433.59 g) were observed in 70-80% field capacity level while the minimum values (68.78 g, 42.02 g and 86.32 g) were recorded under 10-20% field capacity level. Similarly, drought stress also influences the m maximum fluorescence (Fm) in the light-adapted state and has an effect on the maximum quantum yield of PSII. Similarly, the trend was observed in qP (photochemical quenching) and qN (non-photochemical quenching) like minimal and maximal fluorescence.
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