Effect of stem reserve mobilization on grain filling under drought stress conditions in recombinant inbred population of wheat
##plugins.themes.bootstrap3.article.main##
Abstract
Pre-anthesis carbon assimilation of stem reserves is considered as an important source for grain filling during post anthesis drought stresses that inhibit photosynthesis. 175 RILs from cross (C518/2*PBW343) along with check cultivars were evaluated for stem reserve mobilization under irrigated and rainfed conditions. These two cultivars belonging to distinct adaptation mechanism, offer several morpho -physiological and biochemical con-trasts. C 518 is tall and adapted to low input rainfed conditions whereas PBW 343 is semi -dwarf and input re-sponsive. Further C 518 is known for better stem reserves on account of larger peduncle and strong commitment to grain filling due to effective stem reserve mobilization. The parents and the RIL population was tested for stem reserve mobilization by defoliation of flag leaf and second leaf at anthesis under irrigated and rainfed environments. Evaluated entries differed significantly (p<0.001) for reduction in 1000 grain weight under defoliation (TGWL). Percent reduction in 1000 grain weight ranged from 4.4 % to 39.6 % under irrigated environment and 3.2 % to 35.0 under rainfed condition. A significant positive correlation (r = +0.357) between stem reserve mobilization and peduncle length was observed under rainfed condition. Tested RILs vary individually for stem reserve mobilization when subjected to removal of flag leaf and second leaf inhibiting the photosynthesis. The genotypes with better stem reserve mobilization based on 1000 grain weight in the absence of photosynthesis may also provide relative tolerance to drought.
##plugins.themes.bootstrap3.article.details##
##plugins.themes.bootstrap3.article.details##
Carbohydrates, Defoliation, Sink-source modification, Stem reserve mobilization, Wheat
Bidinger, F., Musgrave, R.B. and Fischer, R.A. (1977). Contribution of stored preanthesis assimilates to grain yield in wheat and barley. Nature, 270: 431-433
Blum, A. (1988). Plant breeding for stress environments. CRC Press: Boca Raton, FL, pp. 232
Blum, A. (1998). Improving wheat grain filling under stress by stem reserve mobilization. Euphytica., 100: 77-83
Blum, A., Maye, J. and Golan, G. (1983b). Chemical desiccation of wheat plants as a simulator of post-anthesis stress. II. Relations to drought stress. Field Crops Res., 6: 149-155
Blum, A., Poyarkova, H., Golan, G. and Mayer, J. (1983a). Chemical desiccation of wheat plants as a simulator of post-anthesis stress. I. Effects on translocation and kernel growth. Field Crops Res., 6: 51-58
Borras, L., Slafer, G.A. and Otegui, M.E. (2004). Seed dry weight response to source-sink manipulation in wheat, maize and soybean: a quantitative reappraisal. Field Crops Res., 86:131-146
Borrell, A., Incoll, L. and Dalling, M. (1993). The influence of the Rht1 and Rht2 alleles on the deposition and use of stem reserve in wheat. Annals of Bot .,71: 317–326
Chanishvili, G., Badridze, S., Barblishivili, T.F. and Dolidze, M.D. (2005). Defoliation, photosynthetic rates, and assimilates transport in grapevine plants. Russian J Pl Physiol., 52:448-453
Davidson, J.L. and Birch, J.W. (1978). Responses of a standard Australian and Mexican wheat to temperature and water stress. Aust J Agric Res., 29: 1091-1106
Ehdaie, B., Alloush, G.A., Madore, M.A. and Waines. J.G. (2006). Genotypic variation for stem reserves and mobilization in wheat: I. Post anthesis changes in inter node dry matter. Crop Sci ., 46: 735-746
Eyles, A., Pinkard, E.A., Davies, N.W., Corkrey, R., Churchill, K., O’Grady, A.P., Sands, P. and Mohammed, C. (2013). Whole-plant versus leaf-level regulation of photosynthetic responses after partial defoliation in Eucalyptus globulus saplings. J Exp Bot., 64:1625–1636
Ezzat-Ahmadi, M., Noormohammadi, G.H., Ghodsi, M. and Kafi, M. (2011). Effect on the accumulation and
re-material sources of stress and limitation of photosynthesis in wheat genotypes. Iranian J Field Crops Res., 9: 241-229
Hunt, L. (1979). Stem weight changes during grain filling in wheat from diverse sources. In S. Ramanujam (ed.) Proceed. 5th Int. Wheat Genetics Symposium, New Delhi, India. pp. 923-927
Maydup, M.L., Antonietta, M., Guiamet, J.J., Graciano, C., Lopez, J.R. and Tambussi, E.A. (2010). The contribution of ear photosynthesis to grain filling in bread wheat (Triticum aestivum L.). Field Crops Res., 119: 48-58
Plaut, Z., Butow, B.J, Blumenthal, C.S. and Wrigley, C.W. (2004). Transport of dry matter into developing wheat kernels and its contribution to grain yield under post-anthesis water deficit and elevated temperature. Field Crops Res., 86: 185-198
Regan, K.L, Whan, B.R. and Turner, N.C. (1993). Evaluation of chemical desiccation as a selection technique for drought resistance in dry land wheat breeding program. Aust J Agric Res., 44: 1683-1691.
Reynolds, M.P., Skovamand, B., Trethowan, R. and Pfeiffer, W. (1999). Evaluating a conceptual model for drought tolerance. In: Using molecular markers to improve drought tolerance. (Ed.): J.M. Ribaut ,CIMMYT,
Mexico.
Schnyder, H. (1993). The role of carbohydrate storage and redistribution in the source-sink relations of wheat and barley during grain filling. New phytologist, 123:233-245
Yang, J. and Zhang, J. (2006). Grain filling of cereals under soil drying. New Phytologist, 169:223-236
Yang, J., Zhang, J., Wang, Z., Zhu, Q. and Liu, L. (2001). Water deficit-induced senescence and its relationship to the remobilization of pre-stored carbon in wheat during grain filling. Agron J ., 93: 196–206
Yang, J., Zhang, J., Wang, Z., Zhu, Q. and Liu, L. (2003). Involvement of abscisic acid and cytokinins in the senescence and remobilization of carbon reserves in wheat subjected to water stress during grain filling. Plant Cell Environ., 26:1621-1631
Zhang, C.J., Chen, G.X., Gao, X.X. and Chu, C.J. (2006). Photosynthetic decline in flag leaves of two field-grown spring wheat cultivars with different senescence properties. South Afr J Bot.., 72:15–23.
This work is licensed under Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) © Author (s)
