CAJ | 학술논문

为明确盐胁迫下外源脯氨酸对甜瓜幼苗体内K+、Na+、Ca2+、Mg2+和Cl-含量及分布的影响，以玉皇和雪美两个甜瓜品种的幼苗为材料，采用营养液栽培进行试验。结果表明：盐胁迫降低了植株体内Ca2+、K+、Mg2+等离子的含量，增加了Na+和 Cl-含量；盐胁迫下，根向茎选择性运输 K+、Ca2+、Mg2+能力降低，而茎向叶选择性运输Ca2+、K+、Mg2+能力却显著增加；外源脯氨酸处理提高了盐胁迫下甜瓜幼苗植株各器官中Ca2+、K+、Mg2+等离子含量，降低了Na+和Cl-含量，增加了组织中的K+/Na+、Mg2+/Na+和Ca2+/Na+，提高了根向茎和茎向叶选择性运输K+、Ca2+、Mg2+的能力。说明在盐胁迫条件下，施用外源脯氨酸能促进甜瓜幼苗对K+、Ca2+、Mg2+的吸收，调节植株体内的离子区域化分布，缓解盐胁迫对甜瓜幼苗的伤害。
위명학염협박하외원포안산대첨과유묘체내K+、Na+、Ca2+、Mg2+화Cl-함량급분포적영향，이옥황화설미량개첨과품충적유묘위재료，채용영양액재배진행시험。결과표명：염협박강저료식주체내Ca2+、K+、Mg2+등리자적함량，증가료Na+화 Cl-함량；염협박하，근향경선택성운수 K+、Ca2+、Mg2+능력강저，이경향협선택성운수Ca2+、K+、Mg2+능력각현저증가；외원포안산처리제고료염협박하첨과유묘식주각기관중Ca2+、K+、Mg2+등리자함량，강저료Na+화Cl-함량，증가료조직중적K+/Na+、Mg2+/Na+화Ca2+/Na+，제고료근향경화경향협선택성운수K+、Ca2+、Mg2+적능력。설명재염협박조건하，시용외원포안산능촉진첨과유묘대K+、Ca2+、Mg2+적흡수，조절식주체내적리자구역화분포，완해염협박대첨과유묘적상해。
The changes of K+, Na+, Ca2+, Mg2+and Cl-contents and their distribution were studied in musk melon seed-ling exposed to proline under salt stress. Salt stress decreased the contents of Ca2+, K+, Mg2+, and increased the contents of Na+and Cl-in melon seedling. Salt stress reduced the transfer of Ca2+, K+, Mg2+from roots to stems, and improved the transfer of Ca2+, K+, Mg2+from stems to leaves. Exogenous proline raised the contents of Ca2+, K+, Mg2+in melon, the ratio of K+/Na+, Mg2+/Na+and Ca2+/Na+, and the transfer of K+, Ca2+and Mg2+from root to stem and from stem to leaves, but lower the contents of Na+and Cl-. It is concluded that exogenous proline can promote the uptake for K+, Ca2+, Mg2+in melon seedling, and allevi-ate the salt damage by regulating regionalized ion distribution in plants.