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Divergent phenotypic response of rice accessions to transient heat stress during early seed development

Increasing global surface temperatures is posing a major food security challenge. Part of the solution to address this problem is to improve crop heat resilience, especially during grain development, along with agronomic decisions such as shift in planting time and increasing crop diversification. R...

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Autores principales: Paul, Puneet, Dhatt, Balpreet K., Sandhu, Jaspreet, Hussain, Waseem, Irvin, Larissa, Morota, Gota, Staswick, Paul, Walia, Harkamal
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6955394/
https://www.ncbi.nlm.nih.gov/pubmed/31956854
http://dx.doi.org/10.1002/pld3.196
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author Paul, Puneet
Dhatt, Balpreet K.
Sandhu, Jaspreet
Hussain, Waseem
Irvin, Larissa
Morota, Gota
Staswick, Paul
Walia, Harkamal
author_facet Paul, Puneet
Dhatt, Balpreet K.
Sandhu, Jaspreet
Hussain, Waseem
Irvin, Larissa
Morota, Gota
Staswick, Paul
Walia, Harkamal
author_sort Paul, Puneet
collection PubMed
description Increasing global surface temperatures is posing a major food security challenge. Part of the solution to address this problem is to improve crop heat resilience, especially during grain development, along with agronomic decisions such as shift in planting time and increasing crop diversification. Rice is a major food crop consumed by more than 3 billion people. For rice, thermal sensitivity of reproductive development and grain filling is well‐documented, while knowledge concerning the impact of heat stress (HS) on early seed development is limited. Here, we aim to study the phenotypic variation in a set of diverse rice accessions for elucidating the HS response during early seed development. To explore the variation in HS sensitivity, we investigated aus (1), indica (2), temperate japonica (2), and tropical japonica (4) accessions for their HS (39/35°C) response during early seed development that accounts for transition of endosperm from syncytial to cellularization, which broadly corresponds to 24 and 96 hr after fertilization (HAF), respectively, in rice. The two indica and one of the tropical japonica accessions exhibited severe heat sensitivity with increased seed abortion; three tropical japonicas and an aus accession showed moderate heat tolerance, while temperate japonicas exhibited strong heat tolerance. The accessions exhibiting extreme heat sensitivity maintain seed size at the expense of number of fully developed mature seeds, while the accessions showing relative resilience to the transient HS maintained number of fully developed seeds but compromised on seed size, especially seed length. Further, histochemical analysis revealed that all the tested accessions have delayed endosperm cellularization upon exposure to the transient HS by 96 HAF; however, the rate of cellularization was different among the accessions. These findings were further corroborated by upregulation of cellularization‐associated marker genes in the developing seeds from the heat‐stressed samples.
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spelling pubmed-69553942020-01-17 Divergent phenotypic response of rice accessions to transient heat stress during early seed development Paul, Puneet Dhatt, Balpreet K. Sandhu, Jaspreet Hussain, Waseem Irvin, Larissa Morota, Gota Staswick, Paul Walia, Harkamal Plant Direct Original Research Increasing global surface temperatures is posing a major food security challenge. Part of the solution to address this problem is to improve crop heat resilience, especially during grain development, along with agronomic decisions such as shift in planting time and increasing crop diversification. Rice is a major food crop consumed by more than 3 billion people. For rice, thermal sensitivity of reproductive development and grain filling is well‐documented, while knowledge concerning the impact of heat stress (HS) on early seed development is limited. Here, we aim to study the phenotypic variation in a set of diverse rice accessions for elucidating the HS response during early seed development. To explore the variation in HS sensitivity, we investigated aus (1), indica (2), temperate japonica (2), and tropical japonica (4) accessions for their HS (39/35°C) response during early seed development that accounts for transition of endosperm from syncytial to cellularization, which broadly corresponds to 24 and 96 hr after fertilization (HAF), respectively, in rice. The two indica and one of the tropical japonica accessions exhibited severe heat sensitivity with increased seed abortion; three tropical japonicas and an aus accession showed moderate heat tolerance, while temperate japonicas exhibited strong heat tolerance. The accessions exhibiting extreme heat sensitivity maintain seed size at the expense of number of fully developed mature seeds, while the accessions showing relative resilience to the transient HS maintained number of fully developed seeds but compromised on seed size, especially seed length. Further, histochemical analysis revealed that all the tested accessions have delayed endosperm cellularization upon exposure to the transient HS by 96 HAF; however, the rate of cellularization was different among the accessions. These findings were further corroborated by upregulation of cellularization‐associated marker genes in the developing seeds from the heat‐stressed samples. John Wiley and Sons Inc. 2020-01-12 /pmc/articles/PMC6955394/ /pubmed/31956854 http://dx.doi.org/10.1002/pld3.196 Text en © 2020 The Authors. Plant Direct published by American Society of Plant Biologists, Society for Experimental Biology and John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Paul, Puneet
Dhatt, Balpreet K.
Sandhu, Jaspreet
Hussain, Waseem
Irvin, Larissa
Morota, Gota
Staswick, Paul
Walia, Harkamal
Divergent phenotypic response of rice accessions to transient heat stress during early seed development
title Divergent phenotypic response of rice accessions to transient heat stress during early seed development
title_full Divergent phenotypic response of rice accessions to transient heat stress during early seed development
title_fullStr Divergent phenotypic response of rice accessions to transient heat stress during early seed development
title_full_unstemmed Divergent phenotypic response of rice accessions to transient heat stress during early seed development
title_short Divergent phenotypic response of rice accessions to transient heat stress during early seed development
title_sort divergent phenotypic response of rice accessions to transient heat stress during early seed development
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6955394/
https://www.ncbi.nlm.nih.gov/pubmed/31956854
http://dx.doi.org/10.1002/pld3.196
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