镉胁迫对黄菖蒲种子萌发和幼根生长的影响  

Effects of Cadmium Stress on Seed Germination and Radicle Growth of Iris pseudacorus L.

作　　者：仇硕[1] 黄苏珍[1] 

机构地区：[1]江苏省中国科学院植物研究所南京中山植物园,南京210014

出　　处：《北方园艺》2007年第11期68-70,共3页Northern Horticulture

基　　金：国家自然科学基金资助项目(30270940);江苏省农业高新技术资助项目(BG2003308)

摘　　要：研究了不同浓度Cd(镉)溶液对黄菖蒲(Iris pseudacorusL.)种子萌发和幼根生长的影响。结果表明:在10 mg.L-1低浓度Cd胁迫下,黄菖蒲种子发芽势为60.8%,明显低于对照(P<0.05),但种子发芽率高达99.17%,稍高于对照,幼根生长情况较好,说明黄菖蒲种子在该浓度Cd胁迫下具有一定的抗性;当处理浓度高于50 mg.L-1,发芽势和发芽率及幼根的长度均随Cd浓度增大而降低,50 mg.L-1Cd浓度胁迫下,种子发芽势为17.5%,种子发芽率及幼根的长度分别为55%和6.96 mm,与对照比,均明显受到抑制(P<0.05),且幼根出现畸形等中毒症状。Effects of seed germination and radicle growth of Iris pseudacorus at different Cadmium concentration were studied. The results showed that： Seed germination energy of Iris pseuclacorus L. was 60.8% under 10 mg · L^-1 Cd concentration, which was lower than control significantly（P〈0. 05）, and seed germination percentages was 99. 17%, which was higher than control and radicle grew better, this indicated that the seed of Iris pseudacorus had better tolerant in 10 mg ·L^-1 Cd concentration. When Cd concentration exceed 50 mg · L^-1 , seed germination energy and seed germination percentages and radicle length of Iris pseudacorus L. were tended to decline as the increasing of Cd concentration. Seed germination energy was 17.5%, seed germination percentages was 55% and radicle length of Iris pseudacorus was 6.96 mm at 50 mg · L^-1Cd treatment, and they were significant difference with control（P〈0. 05）, what＇s more, there was abnormality in radicle for cadmium poisoning.

关 键 词：黄菖蒲(Irispseudacorus L.) CD 种子 萌发 幼根 

分 类 号：S682.24[农业科学—观赏园艺] S604.1[农业科学—园艺学]