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Rudresh Hosahalli Somasundara, Divyashree Thippesh, Yathisha Neeragunda Shivaraj, Dwarakanath Venkatesha, Kumar Hulikall Shivashankara Santhosh, Sharathchandra Ramasandra Govind
Keywords:
Desiccation, Pteridophytes, Relative water content, Anti-oxidant enzymes
Vegetative desiccation tolerance of Oeosporangium elegans and Mickelopteris cordata was evaluated in the current study to understand physiological responses towards desiccation and rehydration in different pteridophyte species. Desiccation tolerance (DT) was measured at different stages of water loss [Water Loss-1 (WL1), Water Loss-2 (WL2), Desiccated (D)] and gain [Water Gain-1 (WG1) and Rehydrated (R)]. Our results shown that relative water content (RWC) and photosynthetic pigments were reduced but not completely destroyed at desiccation. Also, the CO2 exchange rate and Fv/Fm ratio were significantly lower during desiccation. However, concentrations of anthocyanin, proline, lipid peroxidation, superoxide radicals, and activity of antioxidant enzymes were found to be significantly higher at all the time points tested during desiccation. Our results shown that non-Selaginella species of pteridophytes also have the innate ability to counter physiological desiccation through various adaptation methods.
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Authors thanks to CEFIPRA/IFCPRA for funding support and Tumkur University, Tumakuru for providing infrastructure to conduct this research work.