RESPONSE OF SILICON ON MEMBRANE STABILITY, PLANT WATER STATUS AND YIELD OF RICE GENOTYPES UNDER DROUGHT

N. GOKULRAJ¹, V. RAVICHANDRAN²*, P. BOOMINATHAN³, R.P. SOUNDARARAJAN^4
1Department of Crop Physiology, Tamilnadu Agricultural University, Coimbatore, 641003, Tamil nadu, India
²Department of Rice, Tamilnadu Agricultural University, Coimbatore, 641003, Tamil nadu, India
³Department of Crop Physiology, Tamilnadu Agricultural University, Coimbatore, 641003, Tamil nadu, India
⁴Department of Rice, Tamilnadu Agricultural University, Coimbatore, 641003, Tamil nadu, India
* Corresponding Author : ravilux@rediffmail.com

Received : 05-07-2018     Accepted : 12-07-2018     Published : 15-07-2018
Volume : 10     Issue : 13       Pages : 6615 - 6618
Int J Agr Sci 10.13 (2018):6615-6618

Keywords : Rice, Drought, Silicon, Membrane stability, Plant water status, Osmotic potential, Grain yield
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Tamil Nadu Agricultural University, Coimbatore and ICAR-Indian Agricultural Research Institute, New Delhi, India. Author also thanks to PRIVI Life sciences, Navi Mumbai for supplying of chemical silicon
Author Contribution : All author equally contributed

A field experiment was conducted during kharif season of 2017 to study the effect of silicon on membrane stability, plant water status and yield of rice genotypes under drought at Department of Rice, Tamil Nadu Agricultural University, Coimbatore. It is observed from the present study, Maximum membrane stability index (MSI) (93.1) was observed in CB06803 and minimum (86.2) in CB08702 under the control, when drought influenced, Sahbhagidhan retained the maximum MSI (79.8) with lower Malondialdehyde (MDA) content (0.68 µmol g-1) and IR64 fetched the lower MSI (67.6) with lower (MDA) (1.75 µmol g-1). Foliar spray of Silicon (Silixol 0.6 %) under drought increased the MSI to maximum (88.4) in Sahbhagidhan wherein minimum (78.7) was observed in CB13805. In the aspect of plant water status, a greater decrease of 18% in RWC under drought, with lower the reduction in drought tolerant check Sahbhagidhan (14.5%). Foliar spray of silicon (Silixol 0.6%) under drought increased the RWC by 12% with greater the increase in genotype CB13805 (16.3%). However, under drought had greater adjustment in osmotic potential was observed in genotype CB12702 (0.674) while, foliar spray of silicon (Silixol 0.6%) under drought had reduced the osmotic adjustment with higher change in genotype CB06803 followed by susceptible check IR64.The grain yield per plant was observed with 30% under drought, a minimal reduction (1.9%) was observed in genotype CB13804. Foliar spray of silicon (Silixol 0.6%) under drought increased per plant yield by 23% with higher the increase (43%) in genotype CB12702. Irrespective of the genotypes, the foliar spray of silicon (Silixol 06 %) under drought enhanced the membrane stability and plant water status in the above genotypes indicating its importance for reducing the effects of drought and improves the drought tolerance mechanism rice.

1. Pandey V. and Shukla A. (2015) Rice Science, 22(4), 147-161.
2. Kumar S., Dwivedi S., Singh S., Jha S., Lekshmy S., Elanchezhian R., Singh O. and Bhatt B. (2014) SABRAO Journal of Breeding & Genetics, 46(2), 124.
3. Chen D., Wang W., Yin L. and Deng X. (2018) Front Plant Sci., 9, 281.
4. Tripathi D. K., Singh V. P., Ahmad P., Chauhan D. K. and Prasad S. M. (2016) Silicon in plants: advances and future prospects: CRC Press
5. Sairam R., Deshmukh P. and Shukla D. (1997) Increased antioxidant enzyme activity in response to drought and temperature stress related with stress tolerance in wheat genotypes. Paper presented at the Abstract: National Seminar (ISSP), IARI, New Delhi.
6. Barrs H.D. and Weatherley P.E. (1962) Australian Journal of Biological Sciences, 15, 413-428.
7. Hodges D.M., DeLong J.M., Forney C.F. and Prange R.K. (1999) Planta, 207(4), 604-611.
8. Gomez K.A., Gomez K.A. and Gomez A.A. (1984) Statistical procedures for agricultural research: John Wiley & Sons.
9. Etesami H. and Jeong B.R. (2018) Ecotoxicology and environmental safety,147, 881-896.
10. Ju S., Wang L., Zhang C., Yin T. and Shao S. (2017) PloS one,12(10), e0187021.
11. Sharma P. and Dubey R.S. (2005) Plant growth regulation, 46(3), 209-221
12. Swapna S. and Shylaraj K.S. (2017) Rice Science, 24(5), 253-263.
13. Korres N., Norsworthy J., Burgos N. and Oosterhuis D. (2017) Water resources and rural development, 9, 12-27.
14. Cuong T.X., Ullah H., Datta A. and Hanh T.C. (2017) Rice Science, 24(5), 283-290.