The functional activities of the photosynthetic apparatus of two grapevine genotypes (Vitis vinifera L. cvs. Müller-Thurgau and Lagrein) were investigated after low night temperature (LNT) treatment for 7 d. LNT caused important reductions of the net photosynthetic rate (PN) of Lagrein plants due to non-stomatal components. These non-stomatal effects were not evident in Müller-Thurgau. At LNT treatment, the contents of photosynthetic pigments decreased significantly in Lagrein, but in Müller-Thurgau the contents of chlorophyll (Chl) remained unchanged whereas the contents of carotenoids (Car) increased. An increase and decrease of Chl a/b was shown in Mü ller-Thurgau and Lagrein stressed plants, respectively. RuBPC activity and content of soluble proteins were also significantly reduced in Lagrein. Under LNT treatment, photosystem (PS) 2 was markedly more inhibited in Lagrein than in Müller-Thurgau. The decrease in PS 2 activity in Lagrein was mostly due to the marked loss of D1, 47, 43, 33, 28-25, 23 and 17 kDa proteins determined by immunological and SDS-PAGE studies. © 2007 Institute of Experimental Botany, ASCR.

Low Night Temperature Effects on Photosynthetic Performance on Two Grapevine Genotypes / Bertamini, M.; Zulini, L.; Muthuchelian, K.; Nedunchezhian, N.. - In: BIOLOGIA PLANTARUM. - ISSN 0006-3134. - 51:2(2007), pp. 381-385. [10.1007/s10535-007-0080-2]

Low Night Temperature Effects on Photosynthetic Performance on Two Grapevine Genotypes

Bertamini M.;
2007-01-01

Abstract

The functional activities of the photosynthetic apparatus of two grapevine genotypes (Vitis vinifera L. cvs. Müller-Thurgau and Lagrein) were investigated after low night temperature (LNT) treatment for 7 d. LNT caused important reductions of the net photosynthetic rate (PN) of Lagrein plants due to non-stomatal components. These non-stomatal effects were not evident in Müller-Thurgau. At LNT treatment, the contents of photosynthetic pigments decreased significantly in Lagrein, but in Müller-Thurgau the contents of chlorophyll (Chl) remained unchanged whereas the contents of carotenoids (Car) increased. An increase and decrease of Chl a/b was shown in Mü ller-Thurgau and Lagrein stressed plants, respectively. RuBPC activity and content of soluble proteins were also significantly reduced in Lagrein. Under LNT treatment, photosystem (PS) 2 was markedly more inhibited in Lagrein than in Müller-Thurgau. The decrease in PS 2 activity in Lagrein was mostly due to the marked loss of D1, 47, 43, 33, 28-25, 23 and 17 kDa proteins determined by immunological and SDS-PAGE studies. © 2007 Institute of Experimental Botany, ASCR.
2007
2
Bertamini, M.; Zulini, L.; Muthuchelian, K.; Nedunchezhian, N.
Low Night Temperature Effects on Photosynthetic Performance on Two Grapevine Genotypes / Bertamini, M.; Zulini, L.; Muthuchelian, K.; Nedunchezhian, N.. - In: BIOLOGIA PLANTARUM. - ISSN 0006-3134. - 51:2(2007), pp. 381-385. [10.1007/s10535-007-0080-2]
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