Chlorophyll Composition, Chlorophyll Fluorescence, and Grain Yield Change in esl Mutant Rice

Lin, Weiwei; Guo, Xiaodong; Pan, Xinfeng; Li, Zhaowei

doi:10.3390/ijms19102945

Cited by 25 publications

(15 citation statements)

References 32 publications

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“…We hypothesized that photosynthesis and pollen viability under heat treatment are negatively impacted. Although changes in photosystem‐II efficiency have been associated with grain yield (Ort et al , ; Sanchez‐Bragado et al , ; Lin et al , ), as well as with responses to heat (Mathur and Jajoo, ; Yamamoto, ), we did not find statistically significant evidence that photosystem‐II efficiency was affected by heat. Similarly, we did not find statistically significant changes in pollen viability, despite pollen viability having been reported to be affected by heat in other species (Schoper et al , ; Vara Prasad et al , ; Kumar et al , ; Jiang et al , ), as well as in quinoa (Hinojosa, Matanguihan, et al , ).…”

Section: Resultscontrasting

confidence: 82%

Heating quinoa shoots results in yield loss by inhibiting fruit production and delaying maturity

et al. 2020

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Increasing global temperatures and a growing world population create the need to develop crop varieties that provide higher yields in warmer climates. There is growing interest in expanding quinoa cultivation, because of the ability of quinoa to produce nutritious grain in poor soils, with little water and at high salinity. The main limitation to expanding quinoa cultivation, however, is the susceptibility of quinoa to temperatures above approximately 32°C. This study investigates the phenotypes, genes and mechanisms that may affect quinoa seed yield at high temperatures. Using a differential heating system where only roots or only shoots were heated, quinoa yield losses were attributed to shoot heating. Plants with heated shoots lost 60-85% yield as compared with control plants. Yield losses were the result of lower fruit production, which lowered the number of seeds produced per plant. Furthermore, plants with heated shoots had delayed maturity and greater non-reproductive shoot biomass, whereas plants with both heated roots and heated shoots produced higher yields from the panicles that had escaped the heat, compared with the control. This suggests that quinoa uses a type of avoidance strategy to survive heat. Gene expression analysis identified transcription factors differentially expressed in plants with heated shoots and low yield that had been previously associated with flower development and flower opening. Interestingly, in plants with heated shoots, flowers stayed closed during the day while the control flowers were open. Although a closed flower may protect the floral structures, this could also cause yield losses by limiting pollen dispersal, which is necessary to produce fruit in the mostly female flowers of quinoa.

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Section: Resultscontrasting

confidence: 82%

Heating quinoa shoots results in yield loss by inhibiting fruit production and delaying maturity

et al. 2020

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“…Premature senescence generally leads to significant yield loss, while delayed senescence shows increased grain production [39]. Senescence, on the other hand, is required for yield formation and efficient nutrient use [40,41]. In order to investigate the effect of the senescence programme in relation to nitrogen availability on yield formation, grain yield, straw yield, % N in grain and % N in straw were determined in the harvest.…”

Section: The Effect Of Nitrogen Supply On Grain and Straw Yield And mentioning

confidence: 99%

Effect of Senescence Phenotypes and Nitrate Availability on Wheat Leaf Metabolome during Grain Filling

et al. 2019

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The capacity for optimising grain yield depends largely on the timing of senescence and the processes underlying efficient remobilisation and cycling of nutrients from source tissues to the developing grain. This study describes how metabolism is adjusted during senescence in response to varying nitrogen application rates after anthesis. A comprehensive metabolite analysis was performed in field-grown Avalon/Cadenza using segregating doubled haploid wheat genotypes having contrasting traits relating to timing of the onset of senescence. Correlative matrices of metabolites and yield parameters determined the metabolic networks that underlie these phenotypes, and were helpful for identifying unique metabolites that are indicative of timing of senescence. They also revealed robust correlations between steady increases in hexose levels, a late senescence phenotype and high straw yield associated with low N fertiliser levels. Tryptophan, cis-aconitate, phosphate and 1-kestose demonstrated strong perturbations in response to nitrogen availability and progression towards developmental senescence. A comprehensive metabolic map of wheat leaf primary metabolites yielded a cumulative readout of processes that occur during developmental ripening and contribute to grain filling in plants with differential senescence timing.

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“…This large contribution of photosynthates is partially due to the proximity of the flag leaf to the grain, as the sink can more easily attract assimilates from closer sources ( Sicher, 1993 ). The rest of the photosynthates used in grain filling are supplied by the leaf immediately below the flag leaf, and by remobilization of stored carbohydrates in leaf sheaths and older senescing leaves ( Li et al , 2017 ; Lin et al , 2018 ). Agronomic strategies are typically aimed to protect the flag leaf, since its destruction during grain filling is associated with yield losses of up to 45% in rice ( Abou-Khalifa et al , 2008 ).…”

Section: Introductionmentioning

confidence: 99%

“…Increasing rice flag leaf photosynthesis, through either delaying senescence or a more acute leaf angle, has led to higher yields ( Mantilla-Perez et al , 2017 ). Early flag leaf senescence significantly reduces seed-setting rate, 100-grain weight, and yield ( Lin et al , 2018 ). Conversely, delaying senescence prolongs the period in which the flag leaf is photosynthetically active, resulting in more photosynthates that can fill grain ( Ishii, 1993 ; Kobata et al , 2015 ; Leng et al , 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Variation between rice accessions in photosynthetic induction in flag leaves and underlying mechanisms

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et al. 2020

Journal of Experimental Botany

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Several breeding initiatives have sought to improve flag leaf performance as its health and physiology are closely correlated to rice yield. Previous studies have described natural variation of photosynthesis for flag leaves; however, none have examined their performance under the non-steady-state conditions that prevail in crop fields. Photosynthetic induction is the transient response of photosynthesis to a change from low to high light. Rice flag leaf photosynthesis was measured in both steady- and non-steady-state conditions to characterize natural variation. Between the lowest and highest performing accession there was a 152% difference for average CO2 assimilation during induction (Ā300), a 77% difference for average intrinsic water-use efficiency during induction (iWUEavg), and a 185% difference for the speed of induction (IT50), indicating plentiful variation. No significant correlation was found between steady- and non-steady-state photosynthetic traits. Additionally, neither measures of steady-state or non-steady-state photosynthesis of flag leaves correlated with the same measures of leaves in the vegetative growth stage, with the exception of iWUEavg. Photosynthetic induction was measured at six [CO2], to determine biochemical and diffusive limitations to photosynthesis in vivo. Photosynthetic induction in rice flag leaves was limited primarily by biochemistry.

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Chlorophyll Composition, Chlorophyll Fluorescence, and Grain Yield Change in esl Mutant Rice

Cited by 25 publications

References 32 publications

Heating quinoa shoots results in yield loss by inhibiting fruit production and delaying maturity

Heating quinoa shoots results in yield loss by inhibiting fruit production and delaying maturity

Effect of Senescence Phenotypes and Nitrate Availability on Wheat Leaf Metabolome during Grain Filling

Variation between rice accessions in photosynthetic induction in flag leaves and underlying mechanisms

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