Vol. 8 (3) : May-June 2017 issue
Green Farming Vol. 8 (3) : 680-683 ; May-June, 2017
Physiological attributes of sunflower (Helianthus annuus L.) as influenced by moisture regimes
B. SANTHOSHa1*, S. NARENDER REDDYa2 and LAKSHMI PRAYAGAb3
aDepartment of Crop Physiology, College of Agriculture, PJTSAU, Rajendranagar, Hyderabad - 500 030 (Telangana)
bIndian Institute of Oilseeds Research, Rajendranagar, Hyderabad - 500 030 (Telangana)
Designation : 1Ph.D. Scholar *(santoshphysio12@gmail.com), 2Professor, 3Principal Scientist
Subject : Plant Physiology, Crop Physiology and Bio-Chemistry
Paper No. : P-5835
Total Pages : 4
Received : 01 September 2016
Revised accepted : 23 February 2017
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Citation :
B. SANTHOSH, S. NARENDER REDDY and LAKSHMI PRAYAGA. 2017. Physiological attributes of sunflower (Helianthus annuus L.) as influenced by moisture regimes. Green Farming Vol. 8 (3) : 680-683 ; May-June, 2017
ABSTRACT
Investigations were carried out to study the physiological and yield variability in sunflower lines at college farm, College of Agriculture, PJTSAU, Hyderabad during late rabi 2013-14. The material composed of four sunflower hybrids (GMU-337, GMU-437, EC-602063 and DRSF-113). Water stress imposed from 30-65 DAS resulted in decreased SCMR values, stomatal conductance, fluorescence, and photosynthetic rate. The analysis of variance revealed the presence of sufficient variability for physiological attributes. The genotype DRSF-113 showed maximum values for SPAD chlorophyll meter readings (31.5), stomatal conductance (193.5 mmol (H2O) m-2 s-1), photosynthetic rate (25.5 ? moles CO2 m-2s-1), fluorescence (Fv/ Fm) (0.565) and yield (1488 kg/ha) . The results also shown that the yield positively correlated with leaf greenness (SPAD chlorophyll meter readings) and fluorescence (Fv/ Fm). Based on the results, out of the four genotypes studied DRSF-113 and EC-602063 can be concluded as tolerant for moisture stress than genotypes GMU-337 and GMU-437.
Key words :
Drought tolerance, Helinathus annuus, Physiological attributes, Sunflower, Water stress.