Photoperceptive Site of the Photoinduction of Root Hairs in Lettuce (Lactuca sativa L. cv. Grand Rapids) Seedlings Under Low pH Conditions |
| |
Authors: | Silvia De Simone Yoshito Oka Yasunori Inoue |
| |
Affiliation: | (1) Department of Applied Biological Sciences, Faculty of Science and Technology, Science University of Tokyo, Yamazaki 2641, Noda, 278–8510 Japan, JP |
| |
Abstract: | Lactuca sativa L. cv. Grand Rapids) seedlings under acidic conditions by a phytochrome-mediated response. Microbeam irradiation of 1 mm root segments with the first (100 Jm−2) and second (1,000 Jm−2) maxima of the fluence response curve for red light induction of root hair initiation indicated that the ca. 5 mm apical portion of 12 mm long roots was the site of photoperception. The root hair-forming portion of the root was situated at a distance of 1.7 mm from the root tip at the time of red light irradiation and extended (at most 1.5 mm) towards the basal end at a later stage of development, irrespective of which portion of the root was irradiated with red light. Received 13 August 1999/ Accepted in revised form 22 December 1999 |
| |
Keywords: | : Lactuca sativa L. Low pH Microbeam light Photoperceptive site Phytochrome Root hair |
本文献已被 SpringerLink 等数据库收录! |