Khan Faruk Hossain, Nakashima Yoshitaka, Nakamura Toshiyuki, Nakamura Yoshimasa, Hirai Yoshihiko, Hoque Md Anamul, Rhaman Mohammad Saidur, Munemasa Shintaro, Mano Jun'ichi, Murata Yoshiyuki
Division of Agricultural and Life Science, Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan.
Department of Soil Science, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh, Bangladesh.
Biosci Biotechnol Biochem. 2025 Jul 23;89(8):1106-1113. doi: 10.1093/bbb/zbaf062.
Salt stress increases levels of reactive oxygen species (ROS), leading to a variety of damages in plants. Production of reactive carbonyl species (RCS) following ROS accumulation has been reported to be closely related to damage by salt stress. We investigated the effects of RCS scavengers, carnosine and pyridoxamine, on the inhibition of germination and seedling growth of Nipponbare (Oryza sativa L.) by salt stress. The inhibition of germination and the seedling growth by 50 mm NaCl was alleviated by the scavengers. The scavengers suppressed the malondialdehyde accumulation and protein carbonylation but not the ROS accumulation in the salt-stressed shoots. These results indicate that suppression of RCS accumulation improves salt tolerance without affecting ROS production in rice and suggest that RCS accumulation is responsible for the inhibitory effects on seeds and seedlings in rice.
盐胁迫会增加活性氧（ROS）水平，对植物造成多种损害。据报道，ROS积累后活性羰基化合物（RCS）的产生与盐胁迫造成的损害密切相关。我们研究了RCS清除剂肌肽和吡哆胺对盐胁迫下日本晴（Oryza sativa L.）种子萌发和幼苗生长抑制的影响。清除剂缓解了50 mM NaCl对种子萌发和幼苗生长的抑制作用。清除剂抑制了盐胁迫下芽中丙二醛的积累和蛋白质羰基化，但没有抑制ROS的积累。这些结果表明，抑制RCS积累可提高水稻的耐盐性，而不影响ROS的产生，这表明RCS积累是造成水稻种子和幼苗受到抑制作用的原因。
