摘要
试验研究了 1 0mg·L-1的烯效唑浸种处理对番茄幼苗生长及其生理生化性状的影响。结果表明 ,烯效唑浸种处理能显著控制番茄幼苗的徒长 ,使 2～ 5叶期幼苗的株高降低了 12 37%～ 2 9 19% ,使幼苗茎粗、叶面积、地上部干质量和根干质量增加 ,增长率分别达到 8 97%～ 4 4 5 3% ,32 2 0 %～ 5 1 36 % ,15 1 71%～ 2 31 31%和93 2 6 %～ 314 4 1%。生理指标的测定结果显示 ,烯效唑浸种处理的幼苗根系活力、叶绿素含量都明显提高 ,光合速率也高于对照 ,在生理上表现出壮苗效应。在非逆境条件下的电解质外渗率和丙二醛 (MDA)含量显著降低 ,渗透调节物质脯氨酸含量提高 ;超氧化物歧化酶 (SOD)、过氧化物酶 (POD)和过氧化氢酶 (CAT)等保护酶比活性在2～ 5叶期分别比对照提高了 9 5 0 %～ 31 5 5 % ,7 97%～ 16 4 4 %和 3 2 3%～ 38 4 2 % ,增强了幼苗的抗逆能力 ,延缓了叶片衰老。
Effects of seed soaking with 1 0?mg·L -1 uniconazole on the growth and physiological characters of tomato seedlings were investigated. The results showed that the uniconazole treatment retarded the fast growth of tomato seedlings and lowered the height of the plant by 12 37 %-29 19% . It led to increase the diameter of seedling stem, leaf area, dry weight of root by 8 97 %-44 53% , 32 20 %-51 36% , 151 71 %-231 31% and 93 26 %-314 41% , respectively. In addition to a slightly higher photosynthesis rate, the root activity and chlorophyll content of the treated seedlings were increased remarkably. Electrolyte leakage and malondialdehyde (MDA) content were dropped significantly while proline content increased. The activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) elevated by 9 50 %-31 55 %, 7 97 %-16 44% and 3 23 %-38 42% , respectively. The stress resistance of tomato seedlings was improved and the senescence progress of tomato leaves were delayed.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
2004年第2期8-11,共4页
Journal of China Agricultural University
关键词
烯效唑
浸种
番茄
幼苗生长
生理性状
tomato
uniconazole
seed soaking
seedling growth
physiological characters
