Effect of drought stress on flowering characteristics in rice (Oryza sativa L.): A study using genotypes contrasting in drought tolerance and flower opening time
Rice is most susceptible to heat and drought stress at flowering stage, but flowering characteristics under drought stress are not well characterized. This study investigated flowering characteristics of rice genotypes contrasting in their flower opening time (FOT) and level of drought tolerance. Ne...
| Autores principales: | , , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Informa UK Limited
2022
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/126424 |
| _version_ | 1855525101360906240 |
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| author | Ishimaru, Tsutomu Sasaki, Kazuhiro Lumanglas, Patrick D. Cabral, Carlo Leo U. Changrong Ye Mayumi Yoshimoto Kumar, Arvind Henry, Amelia |
| author_browse | Cabral, Carlo Leo U. Changrong Ye Henry, Amelia Ishimaru, Tsutomu Kumar, Arvind Lumanglas, Patrick D. Mayumi Yoshimoto Sasaki, Kazuhiro |
| author_facet | Ishimaru, Tsutomu Sasaki, Kazuhiro Lumanglas, Patrick D. Cabral, Carlo Leo U. Changrong Ye Mayumi Yoshimoto Kumar, Arvind Henry, Amelia |
| author_sort | Ishimaru, Tsutomu |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Rice is most susceptible to heat and drought stress at flowering stage, but flowering characteristics under drought stress are not well characterized. This study investigated flowering characteristics of rice genotypes contrasting in their flower opening time (FOT) and level of drought tolerance. Near-isogenic lines for the early-morning flowering trait (IR64+ qEMF3) and for drought tolerance (IR87707-445-B-B-B), and their recurrent parent cultivar (IR64) were used. IR64+ qEMF3 had stable earlier FOT than IR64 and IR87707-445-B-B-B under drought stress conditions. Drought stress occasionally affects FOT depending on genotype. The number of open spikelets was higher in IR87707-445-B-B-B than in IR64 and IR64+ qEMF3, and the difference among genotypes increased as the rice plants were subjected to more severe stress levels. Panicle temperature increased under drought stress conditions and was similar among genotypes when it was measured at the same time of day, demonstrating that earlier FOT in IR64+ qEMF3 must be beneficial to avoid heat stress at flowering under drought stress conditions. However, IR64+ qEMF3 did not exhibit drought avoidance, as evidenced by the root mass at depth. To assess the potential for the EMF trait to complement ongoing drought breeding efforts, heat tolerance among 13 advanced drought breeding lines and released cultivars was tested. Wide variation in heat tolerance at flowering was observed and, notably, none of the 13 lines possessed the EMF trait. This study therefore proposes that a breeding strategy that transfers the EMF trait into drought tolerant lines could enhance the resilience of rice spikelets to the combined stresses of heat and drought at flowering. |
| format | Journal Article |
| id | CGSpace126424 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Informa UK Limited |
| publisherStr | Informa UK Limited |
| record_format | dspace |
| spelling | CGSpace1264242025-11-12T04:57:27Z Effect of drought stress on flowering characteristics in rice (Oryza sativa L.): A study using genotypes contrasting in drought tolerance and flower opening time Ishimaru, Tsutomu Sasaki, Kazuhiro Lumanglas, Patrick D. Cabral, Carlo Leo U. Changrong Ye Mayumi Yoshimoto Kumar, Arvind Henry, Amelia drought flowering stress temperature rice Rice is most susceptible to heat and drought stress at flowering stage, but flowering characteristics under drought stress are not well characterized. This study investigated flowering characteristics of rice genotypes contrasting in their flower opening time (FOT) and level of drought tolerance. Near-isogenic lines for the early-morning flowering trait (IR64+ qEMF3) and for drought tolerance (IR87707-445-B-B-B), and their recurrent parent cultivar (IR64) were used. IR64+ qEMF3 had stable earlier FOT than IR64 and IR87707-445-B-B-B under drought stress conditions. Drought stress occasionally affects FOT depending on genotype. The number of open spikelets was higher in IR87707-445-B-B-B than in IR64 and IR64+ qEMF3, and the difference among genotypes increased as the rice plants were subjected to more severe stress levels. Panicle temperature increased under drought stress conditions and was similar among genotypes when it was measured at the same time of day, demonstrating that earlier FOT in IR64+ qEMF3 must be beneficial to avoid heat stress at flowering under drought stress conditions. However, IR64+ qEMF3 did not exhibit drought avoidance, as evidenced by the root mass at depth. To assess the potential for the EMF trait to complement ongoing drought breeding efforts, heat tolerance among 13 advanced drought breeding lines and released cultivars was tested. Wide variation in heat tolerance at flowering was observed and, notably, none of the 13 lines possessed the EMF trait. This study therefore proposes that a breeding strategy that transfers the EMF trait into drought tolerant lines could enhance the resilience of rice spikelets to the combined stresses of heat and drought at flowering. 2022-07-03 2023-01-01T16:03:24Z 2023-01-01T16:03:24Z Journal Article https://hdl.handle.net/10568/126424 en Open Access application/pdf Informa UK Limited Ishimaru, Tsutomu, Sasaki, Kazuhiro, Lumanglas, Patrick D., Cabral, Carlo Leo U., Changrong Ye, Mayumi Yoshimoto, Kumar, Arvind and Henry, Amelia. 2022. Effect of drought stress on flowering characteristics in rice (Oryza sativa L.): A study using genotypes contrasting in drought tolerance and flower opening time. Plant Production Science 25(3):359–370. |
| spellingShingle | drought flowering stress temperature rice Ishimaru, Tsutomu Sasaki, Kazuhiro Lumanglas, Patrick D. Cabral, Carlo Leo U. Changrong Ye Mayumi Yoshimoto Kumar, Arvind Henry, Amelia Effect of drought stress on flowering characteristics in rice (Oryza sativa L.): A study using genotypes contrasting in drought tolerance and flower opening time |
| title | Effect of drought stress on flowering characteristics in rice (Oryza sativa L.): A study using genotypes contrasting in drought tolerance and flower opening time |
| title_full | Effect of drought stress on flowering characteristics in rice (Oryza sativa L.): A study using genotypes contrasting in drought tolerance and flower opening time |
| title_fullStr | Effect of drought stress on flowering characteristics in rice (Oryza sativa L.): A study using genotypes contrasting in drought tolerance and flower opening time |
| title_full_unstemmed | Effect of drought stress on flowering characteristics in rice (Oryza sativa L.): A study using genotypes contrasting in drought tolerance and flower opening time |
| title_short | Effect of drought stress on flowering characteristics in rice (Oryza sativa L.): A study using genotypes contrasting in drought tolerance and flower opening time |
| title_sort | effect of drought stress on flowering characteristics in rice oryza sativa l a study using genotypes contrasting in drought tolerance and flower opening time |
| topic | drought flowering stress temperature rice |
| url | https://hdl.handle.net/10568/126424 |
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