盐胁迫下不同基因型番茄可溶性物质含量的变化

以两种野生番茄秘鲁番茄(Lycopersicon peruvianum LAlll)、潘那利番茄(Lycopersicon pennellii LA716)和两种栽培番茄"鲜丰98-7"、"交农1号"为材料,用NaCl 150 mmol/L进行盐胁迫,测定及分析了植株体内Na 、K 、Ca2 等无机离子和某些有机溶质游离脯氨酸、可溶性糖的含量.结果表明,盐胁迫条件下,野生番茄在新叶中积累了大量的Na 等无机离子,而栽培番茄新叶内脯氨酸和可溶性糖的含量却显著提高,且它具有将吸收的Na 区域化到老叶中的能力.说明野生番茄和栽培番茄在可溶性物质的合成和积累能力上有明显差异,它们是通过不同代谢途径和机理来适应盐环境的.

Changes in Solute Content of Different Tomato Genotypes Under Salt Stress

Two wild tomato species Lycopersiconperuvianum LA111, Lycopersicon pennellii LA716 andtwo cultivars Xianfeng 98-7,Jiaonong No.1 withdifferent salt tolerance were treated with NaCl 150mmol/L, and to measure the inorganic ions Na ,K ,Ca2 contents and the organic compounds free proline,soluble sugar contents. The results indicated that un-der salt stress, the wild species accumulated much Na in young leaves(Fig.3), while cultivated speciesproduced and accumulated much free proline andsoluble sugar in young leaves(Figs.1,2), and Na wasmostly distributed to old leaves(Fig.3). So it canbe seen that there are marked differences between wildspecies and cultivars in producing and accumulatingthese solutes under salt treatment. They adapt to saltstress through different salt tolerance mechanisms.