Abstract:
:Chloroplast movement was induced by partial cell illumination using a high-fluence blue microbeam in light-grown and dark-adapted prothallial cells of the fern Adiantum capillus-veneris. Chloroplasts inside the illuminated area moved out (high-fluence response [HFR]), whereas those outside moved toward the irradiated area (low-fluence response [LFR]), although they stopped moving when they reached the border. These results indicate that both HFR and LFR signals are generated by high-fluence blue light of the same area, and that an LFR signal can be transferred long-distance from the beam spot, although an HFR signal cannot. The lifetime of the HFR signal was calculated from the traces of chloroplast movement induced by a brief pulse from a high-fluence blue microbeam to be about 6 min. This is very short compared with that of the LFR (30-40 min; T. Kagawa, M. Wada [1994] J Plant Res 107: 389-398). These data indicate that the signal transduction pathways of the HFR and the LFR must be distinct.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Kagawa T,Wada Mdoi
10.1104/pp.119.3.917subject
Has Abstractpub_date
1999-03-01 00:00:00pages
917-24issue
3eissn
0032-0889issn
1532-2548journal_volume
119pub_type
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