Stimulatory effects of potassium iodide on auxin action in the coleoptile segments of maize (Zea mays) |
| |
Authors: | In-yong Hwang Soo Chul Chang Young Na Lee Young Joo Oh Yeo Jae Kim Woong June Park |
| |
Affiliation: | (1) BK21 Graduate Program for RNA Biology, Department of Molecular Biology, Institute of Nanosensor and Biotechnology, Dankook University, Yongin-si, Gyeonggi-do, 448-701, South Korea;(2) University College, Yonsei University, Seoul, 120-749, South Korea |
| |
Abstract: | Potassium iodide (KI) was found to stimulate IAA-induced elongation of coleoptile segments in maize (Zea mays L.). The promoting effects of KI on coleoptile elongation, which were optimal at 1 mM in the presence of IAA, did not occur as a result of better conservation of IAA in the incubation medium. In addition, KI did not affect fusicoccin- or epibrassinolide-induced elongation. Additionally, sodium iodide (NaI) induced similar stimulatory effects on IAA-induced elongation, however, potassium chloride (KCl) showed no effect, suggesting that iodide is the active component. KI also enhanced IAA-induced ethylene biosynthesis in maize coleoptile segments. Taken together, these results suggest the involvement of KI-sensitive step(s) in auxin action before effectors of the signal transduction pathway split to elongation growth and ethylene biosynthesis. In-yong Hwang and Soo Chul Chang contributed equally to this work. |
| |
Keywords: | Auxin Potassium iodide (KI) Elongation growth Ethylene biosynthesis Maize (Zea mays) |
本文献已被 SpringerLink 等数据库收录! |
|