Effect of Exogenous IAA on Root Growth of Black Soybean under Aluminum Stress(PDF)
《大豆科学》[ISSN:1000-9841/CN:23-1227/S]
- Issue:
- 2013年05期
- Page:
- 650-654
- Research Field:
- Publishing date:
Info
- Title:
- Effect of Exogenous IAA on Root Growth of Black Soybean under Aluminum Stress
- Author(s):
- ?WANG Ping; CHEN Qi; CHEN Dong-jie; WANG Wen-wen; SONG Qian; CHEN Li-mei; LI Kun-zhi
- ?(Biotechnology Research Center,Kunming University of Science and Technology,Kunming 650500,China)
- Keywords:
- Black soybean; Aluminum stress; IAA; Root growth
- PACS:
- -
- DOI:
- 10.11861/j.issn.1000-9841.2013.05.0650
- Abstract:
- ?The inhibition of root growth and development is the main toxic performance of aluminum(Al)on plant growth.To gain insight into the alleviative effects of auxin(IAA)on Al toxicity,the Alresistant(RB)and Alsensitive(SB)black soybeans were used as the materials to investigate the effect of exogenous IAA on root growth under Al stress conditions.The results showed that exogenous application of IAA could not only alleviate the Alinduced inhibition of primary root growth,but also promote the lateral root development and increase the biomass in both RB and SB.After application different concentrations of IAA(0.5,1,25 and 50 μmol· L-1)in 50 μmol· L-1 Al treatment solution,primary root length,lateral root number and length,root/shoot ratio and fresh weight of RB were increased in a concentrationdependent manner,compared with Al treatment.Adding 50 μmol· L-1 IAA in the Al treatment solution had the best promotion effect on primary root length,lateral root density and length,root/shoot ratio and fresh weight of RB,and increased approximately 26.72%,110.69%,12.89%,58.76 %and 51.94%,respectively,compared with Al treatment.Similarly,exogenous application of 0.5,1,25 and 50 μmol· L-1 IAA in Al treatment solution,primary root length,lateral root density and length,root/shoot ratio and fresh weight of SB were also increased to some extent.Whereas,exogenous applying 25?μmol· L-1 IAA in 50 μmol· L-1Al treatment solution had the best promotion effect on SB primary root length,lateral root density and length,root/shoot ratio and fresh weight,and increased approximately 41.02%,63.26%,16.01%,28.87% and 39.43%,respectively,compared with only Al treatment.Results suggested that exogenous applying IAA could efficiently alleviate Al toxicity to plant.
Last Update: 2013-11-12