Photosynthetica 2008, 46(2):279 | DOI: 10.1007/s11099-008-0048-2

ATP-sulfurylase activity, photosynthesis, and shoot dry mass of mustard (Brassica juncea L.) cultivars differing in sulfur accumulation capacity

R. Nazar1, N. A. Khan1,*, N. A. Anjum1
1 Department of Botany, Aligarh Muslim University, Aligarh, India

Sulfur (S) is an essential nutrient element required in a large quantity by mustard. S regulates photosynthesis and plant growth through improving nitrogen (N) acquisition. Mustard cultivars Alankar, Varuna, Pusa Jai Kisan, and SS2 differing in S accumulation capacity calculated as sulfate transport index (STI) were tested for ATP-sulfurylase activity, S and N accumulation, photosynthesis, and shoot dry mass (DM) at 30 and 60 d after sowing (DAS). The activity of ATP-sulfurylase, shoot N content, net photosynthetic rate (P N), leaf area, and shoot DM of the cultivars were in the order: Pusa Jai Kisan>Alankar>Varuna>SS2. ATP-sulfurylase activity was strongly and positively correlated with P N and shoot DM in all the cultivars. Hence ATP-sulfurylase activity may be used as a physiological trait for augmenting photosynthesis and shoot DM.

Additional key words: dry mass; leaf area; nitrogen content; sulfate transport index

Received: August 17, 2007; Accepted: November 23, 2007; Published: June 1, 2008  Show citation

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Nazar, R., Khan, N.A., & Anjum, N.A. (2008). ATP-sulfurylase activity, photosynthesis, and shoot dry mass of mustard (Brassica juncea L.) cultivars differing in sulfur accumulation capacity. Photosynthetica, 46(2), 279. doi: 10.1007/s11099-008-0048-2
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