Harnessing leaf photosynthetic traits and antioxidant defence for multiple stress tolerance in three premium indigenous rice landraces of Jeypore tract of Odisha, India
Debabrata Panda
A B , Biswajeet Mohanty A , Prafulla K. Behera A , Jijnasa Barik A and Swati S. Mishra A
+ Author Affiliations
- Author Affiliations
A Department of Biodiversity and Conservation of Natural Resources, Central University of Orissa,Koraput-764 021, Odisha, India.
B Corresponding author. Email: dpanda80@gmail.com
Functional Plant Biology 47(2) 99-111 https://doi.org/10.1071/FP19126
Submitted: 17 May 2019 Accepted: 12 September 2019 Published: 20 December 2019
Abstract
The aim of the present research was to compare the effects of different abiotic stresses (drought, salinity and submergence) on growth, photosynthesis and PSII activity along with antioxidant defence of three premium rice landraces, namely Kalajeera, Machhakanta and Haladichudi from Jeypore tract of Odisha, India to evaluate their performance under multiple stresses and possibility of using in the pre-breeding programs. Results showed that drought, salinity and submergence significantly reduced plant growth, leaf photosynthesis, water use efficiency (WUE), carboxylation efficiency (CE), PSII activity and SPAD chlorophyll index, and the highest effect was observed in susceptible check variety (IR64). In addition, the indigenous rice lines showed better stomatal traits such as stomatal density (SD), stomatal size (SS) and stomatal number per leaf area (S/LA). Notably, higher activities of antioxidative enzymes and proline accumulation was observed in studied indigenous rice landraces and were found comparable with the drought and salinity tolerant (N22) and submergence tolerant (FR13A) check varieties. Based on our findings it was revealed that these landraces can be expected to possess an adequate level of tolerance to drought, salinity and submergence and showed adaptive fitness to multiple stresses during seedling stage. These landraces can be considered as potential donor for future rice pre-breeding program.
Additional keywords: gas exchange, indigenous rice, multiple abiotic stresses, PSII activity, stomatal traits.
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