Koshiba Taichi, Kobayashi Masaru, Matoh Toru
Laboratory of Plant Nutrition, Graduate School of Agriculture, Kyoto University, Kyoto, Japan.
Plant Signal Behav. 2009 Jun;4(6):557-8. doi: 10.1093/pcp/pcn184. Epub 2009 Jun 15.
Boron (B) is an essential micronutrient for vascular plants. Boron plays a structural role in cell walls through binding to pectic polysaccharides. It still remains unclear how B deficiency, and hence probably alterations in cell wall structure, leads to various metabolic disorders and cell death. To understand the process, we analyzed the physiological changes in suspension- cultured tobacco () BY-2 cells under B deficiency. The results indicated that the cells deprived of B did not undergo a typical programmed cell death process. Oxidative damage was proven to be the direct and major cause of cell death. We discuss possible mechanisms for the generation and accumulation of reactive oxygen species under B deprivation.
硼（B）是维管植物必需的微量营养素。硼通过与果胶多糖结合在细胞壁中发挥结构作用。硼缺乏以及由此可能导致的细胞壁结构改变如何引发各种代谢紊乱和细胞死亡，目前仍不清楚。为了了解这一过程，我们分析了缺硼条件下悬浮培养的烟草（）BY-2细胞的生理变化。结果表明，缺硼的细胞没有经历典型的程序性细胞死亡过程。氧化损伤被证明是细胞死亡的直接和主要原因。我们讨论了缺硼条件下活性氧产生和积累的可能机制。
