The Interactive Effects of Deficit Irrigation and Bacillus pumilus Inoculation on Growth and Physiology of Tomato Plant.
The Interactive Effects of Deficit Irrigation and Bacillus pumilus Inoculation on Growth and Physiology of Tomato Plant.
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DOI：
10.3390/plants12030670
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发表时间：
2023-02-03
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影响因子：
--
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中科院分区：
文献类型：
--
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接种植物根际生长促进细菌（PGPR）和土壤水分亏缺对作物生长和生理的影响仍然很大程度上未知。在这里，在温室中研究了四种灌溉策略（I1-I4）下番茄植株叶片气体交换、生长和水分利用效率（WUE）对短小芽孢杆菌（B.p.）接种的响应。结果表明，土壤水分亏缺，尤其是I4（20%，v/v）时，叶片气孔导度（gs）、蒸腾速率（Tr）和光合速率（An）显着下降，且gs和Tr的下降幅度比An更显着。减少灌溉制度显着降低了非 B.p 中的干物质和植物用水量。控制和 B.p。植物，而减少灌溉则显着增加植物的 WUE 和 B.p。接种对此参数影响不大。本研究发现 PGPR 和亏缺灌溉对叶片气体交换、叶片脱落酸含量和气孔密度的协同效应，特别是 B.p. I4 处理的植物在气孔和叶片尺度上具有最高的 WUE，这表明 B.p.接种可以优化用水并部分缓解土壤水分亏缺的负面影响。这些发现为有效的灌溉管理和未来 PGPR 在农业中的应用提供了有用的信息。
The effects of inoculating plant growth promoting rhizobacteria (PGPR) and soil water deficits on crop growth and physiology remain largely unknown. Here, the responses of leaf gas exchange, growth, and water use efficiency (WUE) of tomato plants to Bacillus pumilus (B.p.) inoculation under four irrigation strategies (I1-I4) were investigated in a greenhouse. Results showed that soil water deficits, especially at I4 (20%, v/v), significantly decreased leaf stomatal conductance (gs), transpiration rate (Tr), and photosynthetic rate (An), and the decrease of gs and Tr were more pronounced than An. Reduced irrigation regimes significantly lowered dry matter and plant water use both in the non-B.p. control and the B.p. plants, while reduced irrigation significantly increased plant WUE, and B.p. inoculation had little effect on this parameter. Synergistic effects of PGPR and deficit irrigation on leaf gas exchange, leaf abscisic acid content, and stomatal density were found in this study, and specifically, B.p. treated plants at I4 possessed the highest WUE at stomatal and leaf scales, suggesting that B.p. inoculation could optimize water use and partly alleviate the negative effects of soil water deficit. These findings provide useful information for effective irrigation management and the application of PGPR in agriculture in the future.
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影响因子：
3.2
作者：
Delshadi, Somayeh;Ebrahimi, Mahdieh;Shirmohammadi, Ebrahimi
通讯作者：
Shirmohammadi, Ebrahimi
影响因子：
3.1
作者：
Delshadi, S.;Ebrahimi, M.;Shirmohammadi, E.
通讯作者：
Shirmohammadi, E.
影响因子：
5.2
作者：
Liu, FL;Jensen, CR;Jacobsen, SE
通讯作者：
Jacobsen, SE
影响因子：
4.3
作者：
Orhan, Emine;Esitken, Ahmet;Sahin, Fikrettin
通讯作者：
Sahin, Fikrettin
影响因子：
4.3
作者：
Masood, Sajid;Zhao, Xue Qiang;Shen, Ren Fang
通讯作者：
Shen, Ren Fang