番木瓜两性株株性转化时温度对叶片内4种物质含量的影响

研究了番木瓜两性株株性发生变化时,温度对叶片内蛋白质、淀粉、水分及游离氨基酸含量的影响,结果表明：叶片蛋白质含量随着温度的升高而降低,38℃较33℃减少了28%,41℃较38℃减少了1.3%;叶片淀粉含量随着温度的升高而降低,35℃较33℃减少了2.9%,38℃较35℃减少了20%;叶片水分含量随着温度的升高有升有降,35℃较33℃水分含量减少了1.9%,38℃较35℃水分含量却增加了1.4%;株性分化时（37～38℃）叶片游离氨基酸的总含量与株性稳定时（33～34℃）相比有所下降,但其中的天门冬氨酸、甘氨酸、精氨酸、脯氨酸的含量增加。高温下,番木瓜两性株的株性变化可能与叶片内蛋白质、淀粉、水分、游离氨基酸等物质含量的变化有关。

Effects of Temperature on Content of Four Materials in Leaves during Gender Transition of Hermaphrodite Papaya (Carica papaya L.)

In the paper,the content changes of protein,starch,moisture and dissociated amino acid in the hermaphrodite plant under different high temperature were analyzed. The results showed that the protein content in leaves decreased with temperature increasing,which decreased 28% at 38 ℃ than that at 33 ℃,and decreased 1.3% at 41 ℃ than that at 38 ℃; the starch content in leaves decreased with temperature increasing too,which decreased 2.9% at 35 ℃ than that at 33 ℃,and decreased 20% at 38 ℃ than that at 35 ℃; with temperature increasing,the moisture content in leaves decreased firstly and then increased,which decreased 1.9% at 35 ℃ than that at 33 ℃,but increased 1.4% at 38 ℃ than that at 35 ℃; the content of dissociated amino acid in leaves between 33 ℃ and 34 ℃,at which the gender of hermaphrodite were stable,those between 37 ℃ and 38 ℃,at which the gender of hermaphrodite were changed,but some of which ,such as aspartic acid,glycin,arginine and proline increased. These data indicated that the gender transition of hermaphrodite papaya might be associated with the content changes of protein,starch,moisture and dissociated amino acid in the hermaphrodite plant under different high temperatures.