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Title of Journal: Acta Physiol Plant

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Abbravation: Acta Physiologiae Plantarum

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Springer-Verlag

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DOI

10.1002/crat.19660010312

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1861-1664

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Acclimation of clusterbean cotyledon to UVB radia

Authors: Padmanava Joshi Sasmita Gartia Manoj Kumar Pradhan Srikanta Panigrahi Lalitendu Nayak Basanti Biswal
Publish Date: 2013/03/07
Volume: 35, Issue: 7, Pages: 2323-2328
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Abstract

The photosynthetic responses of clusterbean Cyamopsis tetraganoloba cotyledons exposed to UVA UVB or UVA + UVB radiation for 1 h daily until day 10 have been compared The loss in the rate of O2 evolution and CO2 assimilation P n are incommensurate with each other in both UVA and UVB exposed samples indicating the occurrence of loss in photostasis of photosynthesis by these two radiation bands The alteration in redox status of Q A further suggests about a loss in redox homeostasis in the photosynthetic electron transport chain However both photochemical efficiency of PS II and P n are well maintained in UVA + UVB exposed cotyledons in spite of reduction in wateruse efficiency The acclimatization of clusterbean cotyledon to UVB radiation in the presence of UVA has been attributed to accumulation of flavonoids increase in stomatal conductance g s and reduction in functional size of PS IIWe thank Prof UC Biswal for going through the manuscript and constructive suggestions We also thank Dr NK Ramaswamy NABD BARC Mumbai and Dr RK Iyer MBAD BARC Mumbai for providing facilities to carry out TL studies The work is supported by UGC New Delhi and DST New Delhi

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