Genetic Dissection of Stem Water-Soluble Carbohydrates and Agronomic Traits in Wheat under Different Water Regimes

Nadia, Khan; Chang, Xiaoping; Jing, Ruilian

doi:10.5539/jas.v9n3p42

Cited by 6 publications

(3 citation statements)

References 49 publications

(68 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, Li et al [44]) reported significantly higher positive correlations between culm stored WSCs and TGW under drought stress. There were significant and positive correlations for stem WSCs at grain filling with accumulating efficiency of stem WSCs and grain filling efficiency at the late stage [45]. Furthermore, a significantly higher correlation of HI with each of WSC and REM under drought realizes the fact that remobilization under stress is mainly contributed to the grains.…”

Section: Discussionmentioning

confidence: 86%

Evaluation of the Tolerance Ability of Wheat Genotypes to Drought Stress: Dissection through Culm-Reserves Contribution and Grain Filling Physiology

Islam

Hossain

et al. 2021

Agronomy

View full text Add to dashboard Cite

Drought 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.

show abstract

Section: Discussionmentioning

confidence: 86%

Evaluation of the Tolerance Ability of Wheat Genotypes to Drought Stress: Dissection through Culm-Reserves Contribution and Grain Filling Physiology

Islam

Hossain

et al. 2021

Agronomy

View full text Add to dashboard Cite

show abstract

“…This may be due to the fact that the wheat stems may serve as a temporary depot of metabolites (Ruuska et al, 2006;Joudi et al, 2012). Many literature sources indicate a close positive correlation between the content of water-soluble carbohydrates in the stems and the weight of grains per ear, or mass of 1000 grains (Ehdaie et al, 2008;Nadia et al, 2017). However, there are also reports indicating absence of such a relationship.…”

Section: Discussionmentioning

confidence: 99%

“…Apart from the fact that carbohydrates contribute to grain ripening, they also contribute to plant osmotic regulation as osmolytes (Blum, 1998;Ehdaie et al, 2008). Therefore, the remobilization of assimilates from the stem, accumulated during vegetative growth in the form of watersoluble carbohydrates, is also an important additional source of grain filling (Reynolds et al, 2015;Nadia et al, 2017). The contribution of remobilized assimilates to grain depends on the genotype, organ and phase of plant development, as well as on the influence of unfavourable factors (Saeidi et al, 2012;Li et al, 2015;Zang et al, 2015;Ovenden et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Depositing ability of stem of winter wheat varieties of different periods of selection

Morgun¹,

Priadkina²,

Zborivska³

2019

Regul. Mech. Biosyst.

View full text Add to dashboard Cite

Adaptation of high-yielding winter wheat crops to changes in climatic conditions has great importance for food security of countries. The remobilization of stem assimilates for grain filling is one of the possible ways of increasing wheat yield in unfavourable environmental conditions. Field experiments in natural conditions with three old and three modern varieties of winter wheat were performed to compare depositing abilities of their stems. The objective of this study was a comparative analysis of the parameters of depositing capacity of stems of the main shoots for identification of the criteria for assessing grain productivity of winter wheat. The parameters of depositing capacity of the stem of the main shoots of three old winter wheat varieties (1997, 2003, and 2008) and three modern ones (2013, 2014 and 2016) were studied in field conditions with natural conditions of water supply (Kyiv Oblast, Ukraine). During the period of formation of reproductive organs (April and May), the amount of precipitation, respectively, was only 17% and 68% of long-term values and average monthly air temperature was 3–4 ºС higher than the climatic norm. We analyzed the variability of the parameters of depositing capacity of the stem of the main shoot and grain productivity of the ear of six wheat winter varieties which differed by time of selection. In unfavourable conditions during the period of formation of reproductive organs the modern winter wheat varieties had an 11% higher yield on average compared to the older ones. It was determined that the highest mass of grain from the ear of the main shoots (1.9–2.1 g) belonged to Odeska 267 variety, a drought-tolerant variety from earlier selection, and three modern varieties – Raihorodka, Prydniprovska and Darunok Podillia. It is demonstrated that these varieties also exceeded two old varieties (Podolianka and Yednist) by stem dry matter weight of main shoot at anthesis by 0.3–0.6 g. The highest content of non-structural carbohydrates at this phase was observed in Odeska 267, Raihorodka and Darunok Podillia varieties (273–307 mg/stem). Correlation analysis revealed the significant correlation between mass of grain from ear and dry matter of stem at anthesis and full ripeness, as well mass of grain from ear and the amount of non-structural carbohydrates at anthesis. Therefore, modern varieties of winter wheat and the drought-tolerant variety have higher yield, weight of dry matter of stem of the main shoot at anthesis and grain productivity of the ear, compared to old varieties. The results of this study indicate that the mass of dry matter of the stem of the main shoot at anthesis can be used as a marker of the grain productivity of winter wheat.

show abstract

Genomic approaches to enhance adaptive plasticity to cope with soil constraints amidst climate change in wheat

et al. 2023

View full text Add to dashboard Cite

Climate change is varying the availability of resources, soil physicochemical properties, and rainfall events, which collectively determines soil physical and chemical properties. Soil constraints—acidity (pH < 6), salinity (pH ≤ 8.5), sodicity, and dispersion (pH > 8.5)—are major causes of wheat yield loss in arid and semiarid cropping systems. To cope with changing environments, plants employ adaptive strategies such as phenotypic plasticity, a key multifaceted trait, to promote shifts in phenotypes. Adaptive strategies for constrained soils are complex, determined by key functional traits and genotype × environment × management interactions. The understanding of the molecular basis of stress tolerance is particularly challenging for plasticity traits. Advances in sequencing and high‐throughput genomics technologies have identified functional alleles in gene‐rich regions, haplotypes, candidate genes, mechanisms, and in silico gene expression profiles at various growth developmental stages. Our review focuses on favorable alleles for enhanced gene expression, quantitative trait loci, and epigenetic regulation of plant responses to soil constraints, including heavy metal stress and nutrient limitations. A strategy is then described for quantitative traits in wheat by investigating significant alleles and functional characterization of variants, followed by gene validation using advanced genomic tools, and marker development for molecular breeding and genome editing. Moreover, the review highlights the progress of gene editing in wheat, multiplex gene editing, and novel alleles for smart control of gene expression. Application of these advanced genomic technologies to enhance plasticity traits along with soil management practices will be an effective tool to build yield, stability, and sustainability on constrained soils in the face of climate change.

show abstract

Genetic Dissection of Stem Water-Soluble Carbohydrates and Agronomic Traits in Wheat under Different Water Regimes

Cited by 6 publications

References 49 publications

Evaluation of the Tolerance Ability of Wheat Genotypes to Drought Stress: Dissection through Culm-Reserves Contribution and Grain Filling Physiology

Evaluation of the Tolerance Ability of Wheat Genotypes to Drought Stress: Dissection through Culm-Reserves Contribution and Grain Filling Physiology

Depositing ability of stem of winter wheat varieties of different periods of selection

Genomic approaches to enhance adaptive plasticity to cope with soil constraints amidst climate change in wheat

Contact Info

Product

Resources

About