2018•Japanese Journal of Crop ScienceOpen access

Na and K Distribution and Its Association with Salinity Tolerance in Salt-tolerant Soybean Genotypes

Yong Nam Song, Makie Kokubun, Takayuki Nakajima, Donghe Xu, Koki Homma

Abstract

NIASコアコレクション世界のダイズから相対乾物重に基づき選抜した塩ストレス耐性と感受性各9品種を用いてポット実験を行い，塩ストレス下における部位別のNaとK濃度を測定し，その耐性機構について検討を行った．塩ストレス耐性9品種中7品種において，吸収したNaを根に留め，葉身への移行を抑制し，耐性を示すことが確認できた．しかしながら，残り2品種（M 44，U-1741-2-2 NO.3）では，葉身へのNa移行が感受性品種と同程度に生じており，別な耐性機構の存在が示唆された．

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Key concepts: Salinity, Salt (chemistry), Genotype, Sodium, Distribution (mathematics), Association (psychology), Agronomy, Biology