Rehydration Induces Quick Recovery of Photosynthesis in Desiccation Tolerant Moss Semibarbula orientalis

By : Hanwant Singh , Upma Bhatt , Deepak Kumar , Vineet Soni

Page No: 183-187

Abstract
Many moss species have ability to survive desiccation-a more severe state of dehydration than drought. At this stage no liquid phase remains in the cellular system, but the plants subsequently recover normal metabolism within minutes or hours upon rehydration. In order to understand the mechanisms of rapid photosynthetic recovery in mosses upon rehydration, we investigated the kinetics of the photosynthetic recovery process in desiccation tolerant moss Semibarbula orientalis through polyphasic chlorophyll a fluorescence OJIP measurements. The maximal quantum efficiency of PSII (Fv/Fm) was increased from 0.09 to 0.5 within 6 min of rehydration. Results clearly reveal that the moss‘s ability for quick recovery upon rehydration is related to rapid biosynthesis of chlorophyll molecules, reorganization of light harvesting complexes (LHCs), and conservation of inactive PS II into active state.

Authors :
Upma Bhatt, Hanwant Singh, Deepak Kumar and Vineet Soni : Plant Bioenergetics & Biotechnology Laboratory, Department of Botany, Mohanlal Sukhadia University, Udaipur-313001, Rajasthan, India
 

DOI: https://doi.org/10.32381/JPSR.2019.35.02.5