Temperature dependence of seedling establishment of a perennial, Dioscorea tokoro |
| |
Authors: | X Zhong E Nishino N Okagami |
| |
Institution: | (1) Agrometeorology Institute, Chinese Academy of Agricultural Sciences, Beijing, China, CN;(2) Faculty of Horticulture, Chiba University, Matsudo 271-8510, Japan Tel./Fax +81-47-308-8946 e-mail: okagami@midori.h.chiba-u.ac.jp, JP |
| |
Abstract: | The temperature dependence of seed germination and seedling growth was analyzed in Dioscorea tokoro, an East Asian summer-green perennial. Seeds were able to germinate fully only at 11°–20°C. At around 17°–20°C the first
leaf petiole of the seedling elongated and quickly set the first leaf blade at a position enabling photosynthesis. At temperatures
higher than 20°C petiole elongation was retarded, and seedlings formed a rhizome and established as a perennial. The rhizome
size increased with temperature up to 29°C. Thus, during growth immediately after germination, temperature appears to be a
key factor in determining whether the plant establishes as a perennial or grows rapidly without rhizome thickening.
Received: April 6, 2001 / Accepted: September 14, 2001 |
| |
Keywords: | Dioscorea tokoro Petiole elongation Rhizome thickening Seed germination Seedling establishment Temperature |
本文献已被 SpringerLink 等数据库收录! |
|