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首页> 美国卫生研究院文献>Plants >Silicon and Nitrate Differentially Modulate the Symbiotic Performances of Healthy and Virus-Infected Bradyrhizobium-nodulated Cowpea (Vigna unguiculata) Yardlong Bean (V. unguiculata subsp. sesquipedalis) and Mung Bean (V. radiata)
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Silicon and Nitrate Differentially Modulate the Symbiotic Performances of Healthy and Virus-Infected Bradyrhizobium-nodulated Cowpea (Vigna unguiculata) Yardlong Bean (V. unguiculata subsp. sesquipedalis) and Mung Bean (V. radiata)

机译：硅和硝酸盐差异调节健康和病毒感染的根瘤菌根瘤菌的Cow豆（Vigna unguiculata）Yardlong Bean（V. unguiculata subsp。sesquipedalis）和绿豆（V. radiata）的共生性能。

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The effects of 2 mM silicon (Si) and 10 mM KNO3 (N)—prime signals for plant resistance to pathogens—were analyzed in healthy and Cowpea chlorotic mottle virus (CCMV) or Cowpea mild mottle virus (CMMV)-infected Bradyrhizobium-nodulated cowpea, yardlong bean and mung bean plants. In healthy plants of the three Vigna taxa, nodulation and growth were promoted in the order of Si + N > N > Si > controls. In the case of healthy cowpea and yardlong bean, the addition of Si and N decreased ureide and α-amino acids (AA) contents in the nodules and leaves in the order of Si + N> N > Si > controls. On the other hand, the addition of N arrested the deleterious effects of CCMV or CMMV infections on growth and nodulation in the three Vigna taxa. However, the addition of Si or Si + N hindered growth and nodulation in the CCMV- or CMMV-infected cowpea and yardlong bean, causing a massive accumulation of ureides in the leaves and nodules. Nevertheless, the AA content in leaves and nodules of CCMV- or CMMV-infected cowpea and yardlong bean was promoted by Si but reduced to minimum by Si + N. These results contrasted to the counteracting effects of Si or Si + N in the CCMV- and CMMV-infected mung bean via enhanced growth, nodulation and levels of ureide and AA in the leaves and nodules. Together, these observations suggest the fertilization with Si + N exclusively in virus-free cowpea and yardlong bean crops. However, Si + N fertilization must be encouraged in virus-endangered mung bean crops to enhance growth, nodulation and N-metabolism. It is noteworthy to see the enhanced nodulation of the three Vigna taxa in the presence of 10 mM KNO3.
机译：在健康和Cow豆褪绿斑驳病毒（CCMV）或Cow豆轻斑驳病毒（CMMV）感染的根瘤菌根瘤菌中，分析了2 mM硅（Si）和10 mM KNO3（N）的信号（植物抗病原体的主要信号）。 pea豆，子豆和绿豆植物。在三个Vigna分类群的健康植物中，结节和生长按Si + N> N> Si>对照的顺序促进。对于健康的cow豆和子豆，Si和N的添加会按照Si + N> N> Si>对照的顺序降低结节和叶片中的尿素和α-氨基酸（AA）含量。另一方面，添加N可以阻止CCMV或CMMV感染对三种Vi豆类群的生长和结瘤的有害影响。但是，添加Si或Si + N会阻碍受CCMV或CMMV感染的cow豆和豆的生长和结瘤，从而导致叶片和结节中大量的尿素积聚。尽管如此，Si促进了CCMV或CMMV感染的cow豆和豆的叶片和根瘤中的AA含量增加，但Si + N却使其降至最低。这些结果与CCMV-中Si或Si + N的抵消作用相反。和CMMV感染的绿豆，通过增强其叶片和根瘤的生长，结节以及脲和AA的水平。总之，这些观察结果表明，仅在无病毒的cow豆和码子豆类作物中使用Si + N施肥。但是，在病毒濒危的绿豆作物中，必须鼓励施以硅+氮肥，以促进其生长，结瘤和氮代谢。值得注意的是，在存在10 mM KNO3的情况下，三种tax豆类群的结节增强。

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