嫁接对西瓜幼苗生长及其耐盐性的影响  

Effects of Grafting on the Growth and the Salt-tolerance of the Watermelon under NaCl Stress

作　　者：刘香娥[1] 郭世荣[1] 田婧[1] 段九菊[1] 

机构地区：[1]南京农业大学园艺学院,江苏南京210095

出　　处：《江苏农业学报》2009年第3期628-634,共7页Jiangsu Journal of Agricultural Sciences

基　　金：国家科技支撑计划项目(2006BAD07B04);江苏省自然科学基金项目(BK2006140);江苏省农业三项工程项目(SX(2008)026);农业部行业公益性项目(nyhyzx07-007)

摘　　要：以耐盐性较强的葫芦品种超丰抗生王为砧木,以盐敏感型的小型西瓜品种秀丽为接穗,研究了嫁接对小型西瓜生长、膜脂过氧化及渗透调节物质含量的影响。结果表明:与自根苗相比,嫁接苗株高、茎粗、鲜重、干重等生长指标的受抑制程度较低;嫁接显著提高了NaCl胁迫下西瓜叶片中超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)和抗坏血酸过氧化物酶(APX)的活性;降低了O2-.产生速率及丙二醛(MDA)含量;显著提高了叶片中游离脯氨酸、可溶性蛋白质等渗透物质的含量。试验结果说明,嫁接可明显提高西瓜幼苗植株的耐盐性。The effects of NaCl stress on the growth, membrane lipid oxidation and the contents of osmoregulation substance of grafted plants and scion-root plants of mini-watermelon were studied with a salt-tolerant cucurbit variety Chaofengkangshengwang as the root stock and a nonsalt-tolerant mini-watermelon variety Xiuli as the scion. It was shown that under NaCl stress, the grafted seedlings got lightly inhibited, the superoxide dismutase（SOD） , peroxidase （POD） , catalase（CAT） and ascorbate peroxidase （APX） activities in the leaves of the grafted plants were significantly higher than those in the leaves of scion-root plants, the O2^- producing rate and malondialdehyde （MDA） content in the leaves of the grafted plants were significantly lower than those in the leaves of the scion-root plants, and the membrane lipid oxidation in the grafted plants was weaker than that in the scion-root plants ; the contents of such osmotic substances such as free proline, soluble protein in the leaves of the grafted plants were significantly higher than those in the leaves of the scion-root plants. The above results proved that the grafted plants performed better in salt tolerance than the scion-root plants.

关 键 词：嫁接 NACL胁迫 小型西瓜 膜脂过氧化 渗透调节物质 

分 类 号：S651.043[农业科学—果树学]