Effects of soil progressive drought during the flowering and boll-forming stage on gas exchange parameters and chlorophyll fluorescence characteristics of the subtending leaf to cotton boll
To investigate the dynamic changes and response mechanisms of gas exchange parameters and fluorescence indices of the subtending leaf to cotton boll under soil progressive drought stress,pot experiments of the hybrid cotton No. 3 were conducted with soil relative water content( SRWC)( 75 ± 5) % as control group,SRWC( 60 ± 5) % and SRWC( 45 ± 5) % as experimental groups dealt with progressive drought for 50 days. Results showed that,the net photosynthetic rate( Pn),stomatal conductance( gs) and leaf intercel...