TY - JOUR
T1 - Variation in photosynthesis and growth of mustard cultivars
T2 - Role of ethylene sensitivity
AU - Iqbal, Noushina
AU - Nazar, Rahat
AU - Khan, M. Iqbal R.
AU - Khan, Nafees A.
N1 - Funding Information:
Authors gratefully acknowledge financial assistance received by the University Grants Commission, New Delhi .
PY - 2012/2/24
Y1 - 2012/2/24
N2 - Ethylene is involved in various aspects of plant growth and development. We studied ethylene sensitivity in four mustard (Brassica juncea L. Czern and Coss.) cultivars, Pusa Jai Kisan, Alankar, Basanti and SS2 using chemicals that modify ethylene production and examined its role in determining photosynthesis and growth. Pusa Jai Kisan showed maximum sensitivity to ethylene and was more responsive to ethylene modulators than SS2, which exhibited minimum sensitivity to ethylene. In the presence of ethephon (ethylene-source), Pusa Jai Kisan exhibited greatest increase in growth and the activity of ribulose-1,5-bisphosphate carboxylase (Rubisco), net photosynthesis, stomatal conductance and intercellular CO 2 concentration, and maximal decrease in these characteristics with ethylene action inhibitor, norbornadiene (NBD). Glucose treatment did not inhibit Rubisco activity, net photosynthesis and growth in ethylene-sensitive plants, but these characteristics were maximally inhibited in ethylene-insensitive plants. Our results show that ethylene sensitivity has a role in determining photosynthesis and growth of mustard plants. The selection of an ethylene-sensitive mustard type would help in augmenting photosynthesis and growth and also provide new insight into the ethylene-mediated physiological responses.
AB - Ethylene is involved in various aspects of plant growth and development. We studied ethylene sensitivity in four mustard (Brassica juncea L. Czern and Coss.) cultivars, Pusa Jai Kisan, Alankar, Basanti and SS2 using chemicals that modify ethylene production and examined its role in determining photosynthesis and growth. Pusa Jai Kisan showed maximum sensitivity to ethylene and was more responsive to ethylene modulators than SS2, which exhibited minimum sensitivity to ethylene. In the presence of ethephon (ethylene-source), Pusa Jai Kisan exhibited greatest increase in growth and the activity of ribulose-1,5-bisphosphate carboxylase (Rubisco), net photosynthesis, stomatal conductance and intercellular CO 2 concentration, and maximal decrease in these characteristics with ethylene action inhibitor, norbornadiene (NBD). Glucose treatment did not inhibit Rubisco activity, net photosynthesis and growth in ethylene-sensitive plants, but these characteristics were maximally inhibited in ethylene-insensitive plants. Our results show that ethylene sensitivity has a role in determining photosynthesis and growth of mustard plants. The selection of an ethylene-sensitive mustard type would help in augmenting photosynthesis and growth and also provide new insight into the ethylene-mediated physiological responses.
KW - Ethylene
KW - Glucose
KW - Growth
KW - Mustard
KW - Photosynthesis
UR - http://www.scopus.com/inward/record.url?scp=84855251191&partnerID=8YFLogxK
U2 - 10.1016/j.scienta.2011.12.005
DO - 10.1016/j.scienta.2011.12.005
M3 - Article
AN - SCOPUS:84855251191
SN - 0304-4238
VL - 135
SP - 1
EP - 6
JO - Scientia Horticulturae
JF - Scientia Horticulturae
ER -