钙及其抑制剂对亚高温逆境条件下番茄秧苗的调控  

Regulation of Calcium on Tomato Seeding under Subhigh Temperature

作　　者：徐坤鹏[1] 齐明芳[1] 李天来[1] 许涛[1] 张娇[1] 蒋青青[1] 

机构地区：[1]沈阳农业大学园艺学院,辽宁省设施园艺重点实验室,辽宁沈阳110161

出　　处：《北方园艺》2010年第6期8-12,共5页Northern Horticulture

基　　金：公益性行业(农业)科研专项基金资助项目(nyhyzx07-007);辽宁省重大资助项目(2006215001);辽宁省教育厅创新团队资助项目(2008T174)

摘　　要：通过喷施CaCl2及EGTA(钙螯合剂)和LaCl3(钙通道阻塞剂),探讨钙对亚高温逆境下番茄幼苗的调控作用。结果表明:CaCl2处理促进了植株在亚高温逆境下的生长,抑制剂LaCl3处理,则加剧了高温对植株的伤害程度;CaCl2处理提高了叶片中各种形态钙的含量,而EGTA与LaCl3处理并没有影响叶片中总钙的含量,但降低了水溶性钙含量,不同程度地增加了果胶酸钙与硅酸钙含量;叶片中水溶性钙与壮苗指数呈显著正相关,而硅酸钙含量与壮苗指数负相关;钙主要通过水溶性钙对亚高温下番茄秧苗起调控作用。Regulation of calcium on tomato seeding under sub-high temperature was researched by treating with CaCl2, Ca^2＋ chelator EGTA, and Ca^2＋ channel inhibitor LaCl3 on tomato seeding with 7 leaves. The results showed that CaCl2 promoted plant growth under high temperature stress, hut LaCl3 and EGTA, especially the first, aggravated the effect of sub-high temperature. CaCl3 increased the content of various fraction of calcium. EGTA and LaCl3 treatments had no effect on total calcium content, but it decreased water-soluble calcium content and increased the content of pectate-bound and calcium silicate fractions. It was showed that the seedling index was significantly positive with the content of water- soluble calcium and negative with the content of calcium silicate. These results were further proved that water-soluble calcium played an important role in regulating tomato seeding under sub-high temperature stress.

关 键 词：番茄 钙 亚高温 

分 类 号：S641.204.3[农业科学—蔬菜学]