Back to the Wild: On a quest for donors toward salinity tolerant rice
Salinity stress affects global food producing areas by limiting both crop growth and yield. Attempts to develop salinity-tolerant rice varieties have had limited success due to the complexity of the salinity tolerance trait, high variation in the stress response and a lack of available donors for ca...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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Frontiers Media
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/164526 |
| _version_ | 1855519364210491392 |
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| author | Solis, Celymar A. Yong, Miing T. Vinarao, Ricky Jena, Kshirod Holford, Paul Shabala, Lana Zhou, Meixue Shabala, Sergey Chen, Zhong-Hua |
| author_browse | Chen, Zhong-Hua Holford, Paul Jena, Kshirod Shabala, Lana Shabala, Sergey Solis, Celymar A. Vinarao, Ricky Yong, Miing T. Zhou, Meixue |
| author_facet | Solis, Celymar A. Yong, Miing T. Vinarao, Ricky Jena, Kshirod Holford, Paul Shabala, Lana Zhou, Meixue Shabala, Sergey Chen, Zhong-Hua |
| author_sort | Solis, Celymar A. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Salinity stress affects global food producing areas by limiting both crop growth and yield. Attempts to develop salinity-tolerant rice varieties have had limited success due to the complexity of the salinity tolerance trait, high variation in the stress response and a lack of available donors for candidate genes for cultivated rice. As a result, finding suitable donors of genes and traits for salinity tolerance has become a major bottleneck in breeding for salinity tolerant crops. Twenty-two wild Oryza relatives have been recognized as important genetic resources for quantitatively inherited traits such as resistance and/or tolerance to abiotic and biotic stresses. In this review, we discuss the challenges and opportunities of such an approach by critically analyzing evolutionary, ecological, genetic, and physiological aspects of Oryza species. We argue that the strategy of rice breeding for better Na+ exclusion employed for the last few decades has reached a plateau and cannot deliver any further improvement in salinity tolerance in this species. This calls for a paradigm shift in rice breeding and more efforts toward targeting mechanisms of the tissue tolerance and a better utilization of the potential of wild rice where such traits are already present. We summarize the differences in salinity stress adaptation amongst cultivated and wild Oryza relatives and identify several key traits that should be targeted in future breeding programs. This includes: (1) efficient sequestration of Na+ in mesophyll cell vacuoles, with a strong emphasis on control of tonoplast leak channels; (2) more efficient control of xylem ion loading; (3) efficient cytosolic K+ retention in both root and leaf mesophyll cells; and (4) incorporating Na+ sequestration in trichrome. We conclude that while amongst all wild relatives, O. rufipogon is arguably a best source of germplasm at the moment, genes and traits from the wild relatives, O. coarctata, O. latifolia, and O. alta, should be targeted in future genetic programs to develop salt tolerant cultivated rice. |
| format | Journal Article |
| id | CGSpace164526 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Frontiers Media |
| publisherStr | Frontiers Media |
| record_format | dspace |
| spelling | CGSpace1645262024-12-19T14:12:10Z Back to the Wild: On a quest for donors toward salinity tolerant rice Solis, Celymar A. Yong, Miing T. Vinarao, Ricky Jena, Kshirod Holford, Paul Shabala, Lana Zhou, Meixue Shabala, Sergey Chen, Zhong-Hua plant science Salinity stress affects global food producing areas by limiting both crop growth and yield. Attempts to develop salinity-tolerant rice varieties have had limited success due to the complexity of the salinity tolerance trait, high variation in the stress response and a lack of available donors for candidate genes for cultivated rice. As a result, finding suitable donors of genes and traits for salinity tolerance has become a major bottleneck in breeding for salinity tolerant crops. Twenty-two wild Oryza relatives have been recognized as important genetic resources for quantitatively inherited traits such as resistance and/or tolerance to abiotic and biotic stresses. In this review, we discuss the challenges and opportunities of such an approach by critically analyzing evolutionary, ecological, genetic, and physiological aspects of Oryza species. We argue that the strategy of rice breeding for better Na+ exclusion employed for the last few decades has reached a plateau and cannot deliver any further improvement in salinity tolerance in this species. This calls for a paradigm shift in rice breeding and more efforts toward targeting mechanisms of the tissue tolerance and a better utilization of the potential of wild rice where such traits are already present. We summarize the differences in salinity stress adaptation amongst cultivated and wild Oryza relatives and identify several key traits that should be targeted in future breeding programs. This includes: (1) efficient sequestration of Na+ in mesophyll cell vacuoles, with a strong emphasis on control of tonoplast leak channels; (2) more efficient control of xylem ion loading; (3) efficient cytosolic K+ retention in both root and leaf mesophyll cells; and (4) incorporating Na+ sequestration in trichrome. We conclude that while amongst all wild relatives, O. rufipogon is arguably a best source of germplasm at the moment, genes and traits from the wild relatives, O. coarctata, O. latifolia, and O. alta, should be targeted in future genetic programs to develop salt tolerant cultivated rice. 2020-03-20 2024-12-19T12:54:00Z 2024-12-19T12:54:00Z Journal Article https://hdl.handle.net/10568/164526 en Open Access Frontiers Media Solis, Celymar A.; Yong, Miing T.; Vinarao, Ricky; Jena, Kshirod; Holford, Paul; Shabala, Lana; Zhou, Meixue; Shabala, Sergey and Chen, Zhong-Hua. 2020. Back to the Wild: On a quest for donors toward salinity tolerant rice. Front. Plant Sci., Volume 11 |
| spellingShingle | plant science Solis, Celymar A. Yong, Miing T. Vinarao, Ricky Jena, Kshirod Holford, Paul Shabala, Lana Zhou, Meixue Shabala, Sergey Chen, Zhong-Hua Back to the Wild: On a quest for donors toward salinity tolerant rice |
| title | Back to the Wild: On a quest for donors toward salinity tolerant rice |
| title_full | Back to the Wild: On a quest for donors toward salinity tolerant rice |
| title_fullStr | Back to the Wild: On a quest for donors toward salinity tolerant rice |
| title_full_unstemmed | Back to the Wild: On a quest for donors toward salinity tolerant rice |
| title_short | Back to the Wild: On a quest for donors toward salinity tolerant rice |
| title_sort | back to the wild on a quest for donors toward salinity tolerant rice |
| topic | plant science |
| url | https://hdl.handle.net/10568/164526 |
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