• R. Desingh
• G.Kanagaraj

The effect of potassium nutrition on growth, phenology, photosynthesis, RuBP carboxylase and photochemical characteristics were investigated by supplying varying levels of potassium to cotton plants (0 gk/l, 5 gk/l, 20 gk/l, 50gk/l, 80 gk/l). Potassium nutrition on growth and phenology show that its deficiency significantly reduced the plant height, internode elongation and petiole length and dry weight. Chlorophyll content and photochemical characteristics were estimated in isolated chloroplasts. Decreasing potassium in nutrient solution has significantly reduced the photochemical properties in isolated chloroplasts. Increasing potassium nutrition resulted an increase in photosynthesis and RuBP carboxylase activity during growth stages. It was concluded that potassium fertilization significantly affects the photosynthetic characteristics in cotton leaves, which finally reduced the dry matter yields.

Cotton, growth, photosynthesis, photosystem, potassium, RuBPcarboxylase.

"PHOTOSYNTHESIS, RUBP CARBOXYLASE ACTIVITY AND PHOTOCHEMICAL CHARACTERISTICS IN COTTON LEAVES AS AFFECTED BY POTASSIUM NUTRITION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.287-297, March-2019, Available :http://www.jetir.org/papers/JETIR1903B44.pdf

"PHOTOSYNTHESIS, RUBP CARBOXYLASE ACTIVITY AND PHOTOCHEMICAL CHARACTERISTICS IN COTTON LEAVES AS AFFECTED BY POTASSIUM NUTRITION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp287-297, March-2019, Available at : http://www.jetir.org/papers/JETIR1903B44.pdf