Abstract:
:Regulation of photosynthetic activity can contribute to the prevention of photodamage in stress resistant plants during exposure to drought or low temperatures. Responses to increasing levels of water stress were examined in seedlings of the stress resistant forest conifer, white spruce (Picea glauca [Moench.] Voss). Some seedlings were grown under aseptic in vitro conditions and others in pots. In relatively resistant in vivo seedlings, photosynthetic activities changed slowly in response to increasing water stress. Highly sensitive in vitro seedlings responded to water deficits similarly to in vivo seedlings but over a much shorter time scale. Fluorescence, CO(2) exchange, and stomatal conductance data reported here suggest possible mechanisms for the regulation of photochemical activity in these plants.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Toivonen P,Vidaver Wdoi
10.1104/pp.86.3.744subject
Has Abstractpub_date
1988-03-01 00:00:00pages
744-8issue
3eissn
0032-0889issn
1532-2548journal_volume
86pub_type
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