Abstract
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.
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Abbreviations
- DAS:
-
days after sowing
- DM:
-
dry mass
- DTT:
-
dithiothreitol
- PAR:
-
photosynthetically active radiation
- P N :
-
net photosynthetic rate
- PVP:
-
polyvinylpyrrolidone
- RH:
-
relative humidity
- STI:
-
sulfate transport index
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Nazar, R., Khan, N.A. & Anjum, N.A. ATP-sulfurylase activity, photosynthesis, and shoot dry mass of mustard (Brassica juncea L.) cultivars differing in sulfur accumulation capacity. Photosynthetica 46, 279–282 (2008). https://doi.org/10.1007/s11099-008-0048-2
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DOI: https://doi.org/10.1007/s11099-008-0048-2