Expression of the early light-induced protein but not the PsbS protein is influenced by low temperature and depends on the developmental stage of the plant in field-grown pea cultivars

Noren, H.Norén, H., Dept. of Biochemistry and Biophysics, Arrhenius Labs. for Natural Sciences, Stockholm University, SE-10691 Stockholm, Sweden (author)

Plant cells exposed to photo-inhibitory conditions respond by accumulation of the early light-induced proteins (Elips) with a potential photoprotective function. Here we studied the expression of Elip in various pea cultivars grown under agricultural or climate-chamber conditions. We demonstrated that the expression of Elip in all cultivars was developmentally regulated and its level decreased during flowering and post-flowering periods. Surprisingly, significant amounts of Elip transcripts, but not proteins, accumulated in senescing leaves already under low light conditions and the exposure to light stress resulted in a 10-times higher induction of Elip transcripts. Furthermore, the expression pattern of Elip transcript and protein significantly differed under field and growth-chamber conditions. First, the expression level of Elip was much higher in field-grown than in chamber-grown cultivars. Second, substantial amounts of Elip transcripts and protein were detected during the night in field-grown plants in contrast to chamber-grown cultivars due to a synergistic effect of light stress occurring during the day and low temperature present during the following night. The expression of the PsbS protein related to Elips and involved in the photoprotection of the photosystem II was relatively constant under all conditions tested.

Svensson, P.Department of Plant Biology, Swedish Agricultural University, Box 7080, SE-75007 Uppsala, Sweden (author)
Stegmark, R.Findus R and D AB, SE-26725 Bjuv, Sweden (author)
Funk, ChristianeUmeå universitet,Kemiska institutionen,Dept. of Biochemistry and Biophysics, Arrhenius Labs. for Natural Sciences, Stockholm University, SE-10691 Stockholm, Sweden, Department of Biochemistry, Umeå University, SE-90187 Umeå, Sweden(Swepub:umu)chefuk04 (author)
Adamska, I.Dept. of Biochemistry and Biophysics, Arrhenius Labs. for Natural Sciences, Stockholm University, SE-10691 Stockholm, Sweden (author)
Andersson, B.Linköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska högskolan(Swepub:liu)beran03 (author)
Norén, H., Dept. of Biochemistry and Biophysics, Arrhenius Labs. for Natural Sciences, Stockholm University, SE-10691 Stockholm, SwedenDepartment of Plant Biology, Swedish Agricultural University, Box 7080, SE-75007 Uppsala, Sweden (creator_code:org_t)

By the author/editor: Noren, H.; Svensson, P.; Stegmark, R.; Funk, Christiane; Adamska, I.; Andersson, B.

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