铵介导的水杨酸含量降低和拟南芥突变体生长的恢复受 NDR1 和 NPR1 的调节。
Ammonium-mediated reduction in salicylic acid content and recovery of plant growth in Arabidopsis mutants is modulated by NDR1 and NPR1.
机构信息
Department of Agriculture, Forestry and Bioresources, Research Institute of Agriculture and Life Sciences, and Plant Genomics and Breeding Institute, Seoul National University, Seoul, Korea.
Department of Applied Biosciences, Kyungpook National University, Daegu, Korea.
出版信息
Plant Signal Behav. 2021 Sep 2;16(9):1928819. doi: 10.1080/15592324.2021.1928819. Epub 2021 May 14.
The mutants exhibit high SA accumulation and consequently severe dwarfism. Although mutants exhibit growth recovery upon exogenous ammonium supply, the underlying mechanism remains unknown. Here, we investigated the effect of ammonium on SA level and plant growth in SA-accumulating mutants. The growth of and mutants was recovered to wild-type (WT) levels upon exogenous ammonium supply, but that of () and () double mutants was unaffected. The SA level was decreased by exogenous ammonium application in , and mutants. The level of nitrate reductase (NR) was almost the same in all genotypes (WT, , and ), regardless of the ammonium treatment, suggesting that exogenous ammonium supply to and double mutants does not have any effect on their growth and NR levels, but decreases the SA level. Taken together, these results indicate that ammonium acts as a signaling molecule to regulate the SA amount, and NDR1 and NPR1 play a positive role in the ammonium-mediated growth recovery of mutants.
突变体表现出高水平的水杨酸（SA）积累，从而导致严重的矮化。尽管突变体在外源铵供应下表现出生长恢复，但潜在的机制尚不清楚。在这里，我们研究了铵对 SA 水平和积累 SA 的突变体植物生长的影响。在提供外源铵时，突变体和的生长恢复到野生型（WT）水平，但突变体和的双突变体的生长不受影响。在外源铵处理下，突变体和中的 SA 水平降低。硝酸还原酶（NR）的水平在所有基因型（WT、和）中几乎相同，与铵处理无关，这表明外源铵供应对和双突变体的生长和 NR 水平没有任何影响，但降低了 SA 水平。综上所述，这些结果表明，铵作为一种信号分子来调节 SA 的含量，而 NDR1 和 NPR1 在铵介导的突变体生长恢复中发挥积极作用。
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