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Pal, Anand Kumar
- Long-Term Exposure to Combined Treatment of Elevated CO2 and Salt Induces Iron Deficiency Responses in Porteresia coarctata
Abstract Views :250 |
PDF Views:101
Authors
Deepanwita Purohit
1,
Maganti Sowjanya
1,
Anand Kumar Pal
1,
H. M. Sankararamasubramanian
1,
Ajay Parida
1
Affiliations
1 M.S. Swaminathan Research Foundation, III Cross Street, Institutional Area, Taramani, Chennai 600 113, IN
1 M.S. Swaminathan Research Foundation, III Cross Street, Institutional Area, Taramani, Chennai 600 113, IN
Source
Current Science, Vol 112, No 04 (2017), Pagination: 844-849Abstract
Plants with rising atmospheric carbon dioxide (CO2) level in the environment may change their nutrient demands to sustain growth. The mechanisms concerning iron dynamics in plants under the interactive effect of salinity and elevated CO2 are poorly understood. This study examines the effects of long-term as well as short-term growth at elevated CO2 and salt on iron deficiency-associated molecular responses of Porteresia coarctata through analysing the transcript expression of iron deficiency-responsive genes in the leaf tissue. Plants were grown in hydroponic media at ambient or elevated atmospheric CO2 (500 μl l-1), with or without salt, and samples were analysed at three time points, on the 15th, 45th and 90th day. The semiquantitative RT-PCR analysis showed an induced expression of iron deficiency-responsive transcription factor PcIDEF1 and its putative targets OsIRO2-like gene, OsNAAT1-like gene, OsNAS1-like gene, OsYSL2- like gene and PcIRT1 at elevated CO2 with NaCl. Furthermore, a positive correlation in gene expression was observed between PcIDEF1 and its putative targets in the 15th and 45th day samples. By contrast, in the 90th day sample, correlation in gene expression was less evident. Our findings suggest that the interactive effect of elevated CO2 and NaCl can induce a set of molecular responses in P. coarctata for enhanced iron uptake and utilization, thereby reflecting an iron deficiency like stress under such conditions.Keywords
Calcareous Soil, Elevated Carbon Dioxide, Iron-Responsive Genes, Porteresia coarctata, Salinity.Full Text
- Responses of Selected C3 and C4 Halophytes to Elevated CO2 Concentration under Salinity
Abstract Views :271 |
PDF Views:87
Authors
Saranya Jothiramshekar
1,
Jenifer Joseph Benjamin
1,
Rani Krishnasamy
1,
Anand Kumar Pal
1,
Suja George
1,
Rajalakshmi Swaminathan
1,
Ajay K. Parida
1
Affiliations
1 Department of Plant Molecular Biology, M.S. Swaminathan Research Foundation, III Cross Street, Taramani Institutional Area, Taramani, Chennai 600 113, IN
1 Department of Plant Molecular Biology, M.S. Swaminathan Research Foundation, III Cross Street, Taramani Institutional Area, Taramani, Chennai 600 113, IN
Source
Current Science, Vol 115, No 1 (2018), Pagination: 129-135Abstract
Halophytes have superior capacity to withstand soil salinity and are appropriate resources to study the mechanism of salt tolerance which can be harnessed to develop crops to withstand salinity. In this communication, we report the effect of salinity (200 mM NaCl) and elevated carbon dioxide (CO2) treatments in tandem, on select halophytes that have different photosynthetic pathways: C3 and C4. The plants were raised in ambient (380 ppm) and enriched (500 ppm) concentrations of CO2 using a mini-FACE facility. Total chlorophyll content, total soluble sugar concentration, lipid peroxidation level and electrolyte leakage were measured from fresh leaf samples collected at different time points. The results show a positive effect for elevated CO2 concentration on salt tolerance in both C3 and C4 plants, and indicate that halophytes may benefit from rising atmospheric CO2 concentration. The results also suggest that C4 halophytes may benefit from the rising atmospheric CO2 concentration than C3 halophytes.Keywords
Elevated Carbon Dioxide, Halophytes, Salinity, Photosynthetic Pathway, Sesuvium portulacastrum, Suaeda nudiflora.Full Text
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