Abstract:
:The sensitivity of lettuce (Lactuca sativa L. cv Grand Rapids) seeds to red light was reduced by NaCl concentrations which had no effect upon the germination of continuously illuminated seeds. The germination capacity of the seeds was fully restored by increased red light exposures. Indirect evidence indicates that NaCl does not affect the photoconversion of red-absorbing form of phytochrome to the far-red absorbing form of phytochrome. Instead, the increased red light requirements are attributable to increases in the threshold levels of the far-red absorbing form of phytochrome necessary to induce germination and to changes in the slopes of the fluence-response curves. Results also show that the sensitivity of the seeds to NaCl decreased as the time between red light irradiation and the imposition of NaCl stress increased.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Scorer KN,Epel BL,Waisel Ydoi
10.1104/pp.79.1.149subject
Has Abstractpub_date
1985-09-01 00:00:00pages
149-52issue
1eissn
0032-0889issn
1532-2548journal_volume
79pub_type
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