锌硼营养对苦瓜叶片碳氮代谢的影响

Effect of zinc and boron nutrition on carbon and nitrogen metabolism in leaf of balsam pear (Momordica charantia)

摘要: 采用田间试验、植株生理生化测定方法,研究了锌、硼营养对苦瓜(株洲长白)叶片碳氮代谢的影响。结果表明,在锌、硼缺乏的红壤中施用硫酸锌和硼砂可提高苦瓜上位、下位叶片光合强度(PSR)、碳酸酐酶(CA)、硝酸还原酶活性(NR)、叶绿素、蔗糖、可溶性糖、淀粉、Zn、B、蛋白质和核酸含量;降低游离氨基酸含量(FAA)和RNase活性。生物统计结果表明,叶片Zn与叶绿素、PSR、CA;CA与PSR、蔗糖、可溶性糖;蛋白质与核酸、NR呈极显著正相关。而蛋白质与FAA、RNase;核酸与RNase呈极显著负相关。

Abstract: Effects of zinc and boron nutrition on carbon and nitrogen in leaves of balsam pear( Momordica charantia cv Zhuzhou Changbai) were studied by field trial and physiological determination. The results showed that application of ZnSO4·7H2O and Na2B4O7·2H2O in Zn,B deficient red soil could increase photosynthetic rates(PSR) , carbonic anhydrase(CA) and nitrate reductase(NR) activities, chlorophyll,sucrose, soluble sugar, starch, zinc, boron, protein and nuclear contents, but decrease free ammonic acids(FAA) and RNase activity. The results also showed that there was a significant positive correlation between Zn and chlorophyll, PSR, CA; CA and PSR, sucrose, soluble sugar contents; protein and nuclear, NR; but a significant negative correlation between protein and FAA, RNase; nuclear contents and RNase in leaves.