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Nitrogen-deficiency-induced loss in photosynthesis and modulation of Beta-galactosidase activity during senescence of Arabidopsis leaves

100%

Pandey J. K., Dash S. K., Biswal B.

Acta Physiologiae Plantarum

2017

tom 39

nr 03

Acclimation of clusterbean cotyledon to UV-B radiation in the presence of UV-A: partial restoration of photosynthetic energy balance and redox homeostasis

76%

Joshi P., Gartia S., Pradhan M. K., Panigrahi S., Nayak L., Biswal B.

Acta Physiologiae Plantarum

2013

tom 35

nr 07

The photosynthetic responses of clusterbean (Cyamopsis tetraganoloba) cotyledons exposed to UV-A, UV-B or UV-A + UV-B radiation for 1 h daily until day 10 have been compared. The loss in the rate of O2 evolution and CO2 assimilation (Pn) are incommensurate with each other in both UV-A and UV-B exposed samples indicating the occurrence of loss in photostasis of photosynthesis by these two radiation bands. The alteration in redox status of QA further suggests about a loss in redox homeostasis in the photosynthetic electron transport chain. However, both photochemical efficiency of PS II and Pn are well maintained in UV-A + UV-B exposed cotyledons in spite of reduction in water-use efficiency. The acclimatization of clusterbean cotyledon to UV-B radiation in the presence of UV-A has been attributed to accumulation of flavonoids, increase in stomatal conductance (gs) and reduction in functional size of PS II.

Ograniczanie wyników

2 Acta Physiologiae Plantarum

2 Biswal B.

1 Dash S. K.

1 Gartia S.

1 Joshi P.

1 Nayak L.

1 Pandey J. K.

1 Panigrahi S.

1 Pradhan M. K.

1 2017

1 2013

Wyniki wyszukiwania

Nitrogen-deficiency-induced loss in photosynthesis and modulation of Beta-galactosidase activity during senescence of Arabidopsis leaves

Acclimation of clusterbean cotyledon to UV-B radiation in the presence of UV-A: partial restoration of photosynthetic energy balance and redox homeostasis