Stay-Green Trait Assessment using the Leaf Incubation Method to Examine the Maintenance of Assimilation Rates under High Temperature Conditions during the Grain-Filling Period in Rice

Kobata, Tohru; Shinonaga, Miwa; Yoshida, Haruka; Tomisaka, Kouhei; Akai, Kouhei

doi:10.1626/pps.18.254

Cited by 8 publications

(5 citation statements)

References 29 publications

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“…In the current era of global climate change, introduction of the SGR trait is vital for developing heatresistant cultivars (Kumari et al, 2013). The SGR trait has been linked to increased yield production in many crops under heat stress, including wheat, barley, rice, maize, and cowpea (Kumari et al, 2007;Borrell et al, 2014;Kobata et al, 2015;Gous et al, 2016;Abdelrahman et al, 2017). The stay-green trait has helped to identify heat-tolerant wheat cultivars that maintain yields at high temperatures (Vijayalakshmi et al, 2010).…”

Section: Photosynthetic Pigmentsmentioning

confidence: 99%

Identification and Characterization of Contrasting Genotypes/Cultivars for Developing Heat Tolerance in Agricultural Crops: Current Status and Prospects

et al. 2020

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Section: Photosynthetic Pigmentsmentioning

confidence: 99%

Identification and Characterization of Contrasting Genotypes/Cultivars for Developing Heat Tolerance in Agricultural Crops: Current Status and Prospects

et al. 2020

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“…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 ). In previous studies, more vertical flag leaf angles resulted in 13% higher photosynthetic rates, reduced photoinhibition, delayed leaf senescence, and 15% higher yields ( Chen et al , 2002 ; Mantilla-Perez 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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“…biuncialis accessions (Bachmann et al, 1994; Thomas et al, 1996). Delayed senescence allows the leaves to maintain photosynthetic activity during the active grain-filling period, thus ensuring the incorporation of assimilates to the grain (Thomas and Howarth, 2000; Spano et al, 2003; Kobata et al, 2015). The stay-green phenotype is associated with the ability of plants to maintain grain development longer, resulting in better yields, especially under water-limited conditions (Borrell et al, 2000; Christopher et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Unlocking the Genetic Diversity and Population Structure of a Wild Gene Source of Wheat, Aegilops biuncialis Vis., and Its Relationship With the Heading Time

et al. 2019

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Understanding the genetic diversity of Aegilops biuncialis, a valuable source of agronomical useful genes, may significantly facilitate the introgression breeding of wheat. The genetic diversity and population structure of 86 Ae. biuncialis genotypes were investigated by 32700 DArT markers with the simultaneous application of three statistical methods— neighbor-joining clustering, Principal Coordinate Analysis, and the Bayesian approach to classification. The collection of Ae. biuncialis accessions was divided into five groups that correlated well with their eco-geographic habitat: A (North Africa), B (mainly from Balkans), C (Kosovo and Near East), D (Turkey, Crimea, and Peloponnese), and E (Azerbaijan and the Levant region). The diversity between the Ae. biuncialis accessions for a phenological trait (heading time), which is of decisive importance in the adaptation of plants to different eco-geographical environments, was studied over 3 years. A comparison of the intraspecific variation in the heading time trait by means of analysis of variance and principal component analysis revealed four phenotypic categories showing association with the genetic structure and geographic distribution, except for minor differences. The detailed exploration of genetic and phenologic divergence provides an insight into the adaptation capacity of Ae. biuncialis, identifying promising genotypes that could be utilized for wheat improvement.

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Stay-Green Trait Assessment using the Leaf Incubation Method to Examine the Maintenance of Assimilation Rates under High Temperature Conditions during the Grain-Filling Period in Rice

Cited by 8 publications

References 29 publications

Identification and Characterization of Contrasting Genotypes/Cultivars for Developing Heat Tolerance in Agricultural Crops: Current Status and Prospects

Identification and Characterization of Contrasting Genotypes/Cultivars for Developing Heat Tolerance in Agricultural Crops: Current Status and Prospects

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

Unlocking the Genetic Diversity and Population Structure of a Wild Gene Source of Wheat, Aegilops biuncialis Vis., and Its Relationship With the Heading Time

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