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首页> 外文期刊>African Journal of Biotechnology >Alleviating acid soil stress in cowpea with a local population of arbuscular mycorrhizal fungi
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Alleviating acid soil stress in cowpea with a local population of arbuscular mycorrhizal fungi

机译：用氨骨髓菌根真菌的局部种群缓解豇豆的酸性土壤胁迫

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摘要

In Huai Teecha village in Northern Thailand, local cowpeas were grown on acidic low phosphorus soil without stress symptoms. Arbuscular mycorrhizal fungi from this system have been found to promote growth of many crops but there is no information about their benefit in cowpea. In a field experiment, three improved cowpea lines (ITD - 1131, Ubon Ratchathani and IT90K – 227 - 2) and a local line (Teecha 1) were grown in 3 farmer’s fields on acid low P soils. Roots of the cowpea lines were all heavily colonized by the fungi and their leaf P was within the sufficient range. In a pot experiment, the cowpea line Ubon Ratchathani was grown in acidic and non acidic (pH 5 and 6.7, respectively) soil with three rates of phosphorus (50, 104 and 141 mg phosphorus pot-1) with and without arbuscular mycorrhizal fungi inoculation. Total dry weight of inoculated cowpea was not affected by soil acidity while it was depressed in un-inoculated plants. The fungi increased total dry weight at 50 and 104 mg phosphorus ha-1?but had no effect at 141 mg phosphorus pot-1. Therefore, the fungi had been shown to enhance P uptake by cowpea roots, which resulted in direct benefit to cowpea growth in acidic low P soil.
机译：在泰国北部的淮托金村，本地豇豆在酸性低磷土壤中生长而没有压力症状。从这个系统中发现丛枝菌根真菌促进了许多作物的增长，但没有关于他们在豇豆中受益的信息。在一个田间实验中，三条改进的豇豆线（ITD - 1131，Uber Ratchathani和IT90K - 227 - 2）和当地线（Teecha 1）在酸性低P土壤上的3个农民领域种植。豇豆系的根部都是严重的真菌殖民，他们的叶子P在足够的范围内。在锅实验中，豇豆线ratchathani在酸性和非酸性（pH5和6.7）中生长，具有三种磷（50，104和141毫克磷Pot-1），其中没有枝状菌根真菌接种。接种豇豆的总干重不受土壤酸度的影响，而在未接种的植物中抑制。真菌在50和104mg磷的HA-1中增加了总干重？但在141毫克磷Pot-1中没有作用。因此，已显示真菌以增强豇豆根的p吸收，这导致酸性低P土壤中的豇豆生长直接受益。

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