Effect of Phosphorus Fertilization on the Growth, Photosynthesis, Nitrogen Fixation, Mineral Accumulation, Seed Yield, and Seed Quality of a Soybean Low-Phytate Line
Effect of Phosphorus Fertilization on the Growth, Photosynthesis, Nitrogen Fixation, Mineral Accumulation, Seed Yield, and Seed Quality of a Soybean Low-Phytate Line
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DOI：
10.3390/plants8050119
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发表时间：
2019-05
期刊：
影响因子：
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通讯作者：
Nisar Ahmad Taliman;Q. Dong;Kohei Echigo;V. Raboy;H. Saneoka
中科院分区：
文献类型：
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作者：
Nisar Ahmad Taliman;Q. Dong;Kohei Echigo;V. Raboy;H. Saneoka
作物种子中的磷主要以植酸盐的形式储存，而植酸盐一般不能被单胃动物消化。低植酸大豆品系已经被开发以解决与种子植酸盐相关的各种问题。关于磷肥对低植酸大豆的生产力、生理特性、种子产量和品质的影响，目前的研究资料很少。为了解决这一知识差距，进行了研究，低植酸线和两个正常的植酸品种从日本西部生长时，高和低磷施肥。高磷处理的植株干重、叶片光合速率、固氮量和开花期根瘤干重均高于低磷处理，但低磷处理与正常磷处理之间差异不显著。正如预期的那样，种子产量较高，在较高的磷水平的所有线。值得注意的是，它是较高的低植酸线与正常植酸品种相比，在两个水平的肥料P.低植酸线的种子中的总P浓度是相同的正常植酸品种，但低植酸线的植酸P浓度约50%低于正常植酸品种。结果表明，在低植酸系中，植酸与种子中锌、铁、锰和铜的摩尔比也显著降低。从这些结果可以得出结论，发芽后的生长，叶片光合作用，固氮，产量和种子质量不低于低植酸大豆线相比，目前在日本种植的两个无关的正常植酸品种，低植酸大豆可以提高微量元素的生物利用率。
Crop seed phosphorus (P) is primarily stored in the form of phytate, which is generally indigestible by monogastric animals. Low-phytate soybean lines have been developed to solve various problems related to seed phytate. There is little information available on the effects of P fertilization on productivity, physiological characteristics, and seed yield and quality in low-phytate soybeans. To address this knowledge gap, studies were conducted with a low-phytate line and two normal-phytate cultivars from western Japan when grown under high- and low-P fertilization. The whole plant dry weight, leaf photosynthesis, dinitrogen fixation, and nodule dry weight at the flowering stage were higher in the higher P application level, but were not different between the low-phytate line and normal-phytate cultivars. As expected, seed yield was higher in the higher level of P application for all lines. Notably, it was higher in the low-phytate line as compared with the normal-phytate cultivars at both levels of fertilizer P. The total P concentration in the seeds of the low-phytate line was the same as that of the normal-phytate cultivars, but the phytate P concentration in the low-phytate line was about 50% less than that of the normal-phytate cultivars. As a result the molar ratio of phytic acid to Zn, Fe, Mn, and Cu in seed were also significantly lower in the low-phytate line. From these results, it can be concluded that growth after germination, leaf photosynthesis, nitrogen fixation, yield and seed quality were not less in the low-phytate soybean line as compared with two unrelated normal-phytate cultivars currently grown in Japan, and that low-phytate soybeans may improve the bioavailability of microelements.