Evaluation of the tolerance ability of wheat genotypes to drought stress: dissection through culm-reserves contribution and grain filling physiology

dc.creatorIslam, M.A.
dc.creatorKumar De, R.
dc.creatorHossain, M.A.
dc.creatorHaque, M.S.
dc.creatorUddin, M.N.
dc.creatorFakir, M.S.A.
dc.creatorKader, M.A.
dc.creatorDessoky, E.S.
dc.creatorAttia, A.O.
dc.creatorEl-Hallous, E.I.
dc.creatorHossain, A.
dc.date2021-07-10T00:25:14Z
dc.date2021-07-10T00:25:14Z
dc.date2021
dc.date.accessioned2023-07-17T20:07:51Z
dc.date.available2023-07-17T20:07:51Z
dc.identifierhttps://hdl.handle.net/10883/21571
dc.identifier10.3390/agronomy11061252
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7513352
dc.descriptionDrought stress is one of the limiting factors for grain filling and yield in wheat. The grain filling and determinants of individual grain weight depend on current assimilation and extent of remobilization of culm reserves to grains. A pot experiment was conducted with eight wheat cultivars at the Pot House to study the grain filling and the contributions of reserves in culm, including the sheath to grain yield under drought stress. Drought stress was enforced by restricting irrigation during the grain-filling period. The plants (tillers) were harvested at anthesis, milk-ripe, and maturity. The changes in dry weights of leaves, culm with sheath, spikes, and grains; and the contribution of culm reserves to grain yield were determined. Results revealed that drought stress considerably decreased the grain filling duration by 15–24% and grain yield by 11–34%. Further, drought-induced early leaf senescence and reduced total dry matter production indicate the minimum contribution of current assimilation to grain yield. The stress reduced the contribution of culm reserves, the water-soluble carbohydrates (WSCs), to the grains. The accumulation of culm WSCs reached peak at milk ripe stage in control, varied from 28.6 to 84 mg culm−1 and that significantly reduced in the range from 14.9 to 40.6 mg culm−1 in stressed plants. The residual culm WSCs in control and stressed plants varied from 1.23 to 8.12 and 1.00 to 3.40 mg g−1 culm dry mass, respectively. BARI Gom 24 exhibited a higher contribution of culm WSCs to grain yield under drought, while the lowest contribution was found in Kanchan. Considering culm reserves WSCs and their remobilization along with other studied traits, BARI Gom 24 showed greater drought tolerance and revealed potential to grow under water deficit conditions in comparison to other cultivars.
dc.languageEnglish
dc.publisherMDPI
dc.rightsCIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose
dc.rightsOpen Access
dc.source6
dc.source11
dc.source2073-4395
dc.sourceAgronomy
dc.source1252
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectCulm Reserves
dc.subjectGrain Filling
dc.subjectWater-Soluble Carbohydrates
dc.subjectSTEMS
dc.subjectSEED FILLING
dc.subjectCARBOHYDRATES
dc.subjectWHEAT
dc.subjectYIELDS
dc.titleEvaluation of the tolerance ability of wheat genotypes to drought stress: dissection through culm-reserves contribution and grain filling physiology
dc.typeArticle
dc.typePublished Version
dc.coverageBasel (Switzerland)


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