Pushp Sharma


The physiological basis of yield in oilseeds Brassicas needs to be investigated, and the contribution of these traits to its yield is difficult to decipher. Eight cultivars of Brassica belonging to 3 species viz. B. juncea, B. napus and B. carinata - based on significant differences in yield were tested over two years. Net photosynthesis, transpiration, stomatal conductance and water use efficiency were investigated on 3rd and 4th fully expanded leaf on the main stem and related to yield. Average photosynthetic efficiency (umolm-2s-1) was higher in RLC1 (36.1), GSC6(36.3) and PC5 (33.8) cultivars. Impact of environment was inconspicuous. However interactions (GxY) were significant for the studied photosynthetic traits except Pn. Lower transpiration rates were associated with higher water use efficiency in RLC1 (5.69), GSL1 (5.44) and GSC6 (5.40). Positive correlation between SY and Pn (0.385) was recorded for the first time in Brassicas although the magnitude of association was low. Quality mustard cultivar (RLC1, B. juncea) and amongst B. napus GSC6 (canola) and Hyola PAC401 (hybrid, canola) were higher yielders due to relative high Pn, more efficient utilization of water and chlorophyll content. Indeterminate growth habits of the cultivars indicated highest contribution to Pn by leaves during flowering as compared with early siliquae formation. Environment had a profound impact on the yielding ability and the photosynthetic traits.


Download data is not yet available.


Metrics Loading ...




Brassicas, Chlorophyll, Photosynthesis, Yield

Chongo, G. and McVetty, P.B.E. (2001). Relationship of physiological characters to yield parameters in oilseed rape (Brassica napus L.) Canadian Journal Plant Science , 81:1-6.
Damour, G., Simonneau, T., Cochard, H. and Urban, L. (2010). An overview of models of stomatal conductance at the leaf level. Plant Cell and Environment , 33:1419-1438.
Harper, F. R. and Berkenkamp, B.(1975). Revised growth stage key for Brassica campestris and B. napus. Canadian Jour-nal of Plant Sciences,55: 657-658.
Kaiser, E., Morales, A., Harbinson, J., Kromdijk, J. Havelock, E. and Marcelis, L.F.M. (2014). Dynamic photosynthesis in different environmental conditions. Journal of Experi-ment Botanical Advances Access, 1-12. doi:10.1093/ jxb /eru406.
Kumar, V. and Chopra, A.K. (2014). Ferti-irrigational response of hybrid cultivar of Indian mustard (Brassica juncea L.) to distillery effluent in two seasons. Analytical Chemistry Letters, 4(3): 190-206.
Lowlor, D.W. (1995). Photosynthesis, productivity and environment. Journal Experimental Botany, 46: 1449-1461.
Liu, J. Hua,W. Yang, H.L., Zhan ,G. M., Li, R. J., Deng,, L. B., Wang ,X.F., Liu, G.H. and Wang, H.Z. (2012). The BnGRF2 gene (GRF2-like gene from Brassica napus) enhances seed oil production through regulating cell num-ber and plant photosynthesis. Journal of Experiment Bo-tanical Advances Access , 1-14. doi:10.1093/jxb/ers066.
Merilo, E., Joesaar, I.,Brosche, M., and Kollist, H. (2014). To open or to close species –specific stomatal responses to simultaneously applied opposing environmental factors. New Phytologist , 202:499-508.
Richards, R.A. (2000). Selectable traits to increase crop photo-synthesis and yield of grain crops. Journal of Experimen-tal Botany , 51: 447-458.
Sharma, P., Sardana, V. and Banga,S.S.(2014). Physiological traits and dry matter partitioning under low light stress in identified genotypes of Indian mustard (Brassica juncea). In 2nd National Brassica Conference on Brassicas for Addressing Edible Oil and Nutritional Security held at PunjabAgricultural University Ludhiana during February 14-16.
Sharma, P., Sardana, V. and Banga,S.S.(2012). Shading effect on photosynthesis, dry matter accumulation and yield of Indian mustard (Brassica juncea L.) genotypes. In International Conference on Sustainable Agriculture for Food and Livelihood Security held at Punjab Agricultural University, Ludhiana on November, 27-29.
Tomimatsu, H., and Tang, Y. (2012). Elevated CO2 differen-tially affects photosynthetic induction response in two Populus species with different stomatal behavior. Oecolo-gia, 169: 869-878.
Uddin,M.A., Ullah,M.A.,Sultana,F.,Rahman,K.M.,and Rah-man, M.Z. (2012). Evaluation of some Rapeseed Mutants B on Morpho-Physiological, Biochemical and yield Attrib-utes. Journal Environmental Sciences and Natural Re-search, 5 (2):281-285.
Citation Format
How to Cite
Sharma, P. (2015). Relationship of photosynthesis and related traits to seed yield in oilseed Brassicas. Journal of Applied and Natural Science, 7(2), 851-856. https://doi.org/10.31018/jans.v7i2.695
More Citation Formats:
Research Articles