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

• Autorzy: Joshi P. , Gartia S. , Pradhan M. K. , Panigrahi S. , Nayak L. , Biswal B.
• Języki publikacji: EN

Abstrakty

EN

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.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2013
• Tom: 35
• Numer: 07
• Opis fizyczny: p.2323-2328,fig.,ref.

Twórcy

autor

Joshi P.

• Anchal College, Padampur, Rajborasambar, Bargarh 768036, Odisha, India

autor

Gartia S.

• Anchal College, Padampur, Rajborasambar, Bargarh 768036, Odisha, India
• School of Life Sciences, Sambalpur University, Jyotivihar, Sambalpur 768019, Odisha, India

autor

Pradhan M. K.

• Anchal College, Padampur, Rajborasambar, Bargarh 768036, Odisha, India

autor

Panigrahi S.

• Anchal College, Padampur, Rajborasambar, Bargarh 768036, Odisha, India

autor

Nayak L.

• Anchal College, Padampur, Rajborasambar, Bargarh 768036, Odisha, India

autor

Biswal B.

• School of Life Sciences, Sambalpur University, Jyotivihar, Sambalpur 768019, Odisha, India

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