Effect of elevated temperature on the growth, physiological, and yield-related traits of commercial rice in Malaysia
Rising temperatures from climate change threaten rice production, impacting livelihoods, global food security, and the sustainability of feeding a growing population. Unlike most studies focusing on specific growth stages, this study investigated the effects of 35 °C (T35) and 36 °C (T36) on the gro...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Penerbit Universiti Kebangsaan Malaysia
2025
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| Online Access: | http://journalarticle.ukm.my/25720/ http://journalarticle.ukm.my/25720/1/SML%209.pdf |
| _version_ | 1848816432737943552 |
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| author | Gomathy Sethuraman, Normaniza Osman, Acga, Cheng Wickneswari Ratnam, Mohd Razi Ismail, Nurul Amalina Mohd Zain, |
| author_facet | Gomathy Sethuraman, Normaniza Osman, Acga, Cheng Wickneswari Ratnam, Mohd Razi Ismail, Nurul Amalina Mohd Zain, |
| author_sort | Gomathy Sethuraman, |
| building | UKM Institutional Repository |
| collection | Online Access |
| description | Rising temperatures from climate change threaten rice production, impacting livelihoods, global food security, and the sustainability of feeding a growing population. Unlike most studies focusing on specific growth stages, this study investigated the effects of 35 °C (T35) and 36 °C (T36) on the growth, physiological traits across all growth stages and yield-related traits of four Malaysian rice varieties - Sempadan 303 (S303), Sebernas 307 (S307), UKMRC02 (RC02), and UKMC09 (RC09) – compared to MR219, a high-yielding variety. Elevated temperature observed significant differences in plant height (PH), leaf area index (LAI), 100-filled grain weight (100GW), filled grain (FG), grain to leaf area ratio (GToLAI), and several grain nutrients in rice varieties. LAI correlated positively with PH (R2=0.723**) and stomatal conductance (R2=0.672**). All varieties recorded higher relative chlorophyll content at 126 days after sowing (DAS) surpassing values at 90 DAS and were significantly higher in T36 for MR219 and S303 showing adaptation to elevated temperature. The harvest index was higher in T36 across all varieties, except RC02, which had a lower FG. All varieties showed no significant difference in Mg, Al, and Si, although MR219 and RC09 had lower P and K in T36. Ca was higher in T36 for all varieties except MR219. This study highlights the varied growth, physiological, and yield-related responses of Malaysian rice varieties to elevated temperatures, with MR219, S303, and RC09 showing strong adaptation due to better stress-coping mechanisms such as maintaining higher LAI, 100GW, HI, and Ca, while S307 and RC02 demonstrated susceptibility. |
| first_indexed | 2025-11-15T01:05:47Z |
| format | Article |
| id | oai:generic.eprints.org:25720 |
| institution | Universiti Kebangasaan Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T01:05:47Z |
| publishDate | 2025 |
| publisher | Penerbit Universiti Kebangsaan Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:generic.eprints.org:257202025-09-25T03:12:17Z http://journalarticle.ukm.my/25720/ Effect of elevated temperature on the growth, physiological, and yield-related traits of commercial rice in Malaysia Gomathy Sethuraman, Normaniza Osman, Acga, Cheng Wickneswari Ratnam, Mohd Razi Ismail, Nurul Amalina Mohd Zain, Rising temperatures from climate change threaten rice production, impacting livelihoods, global food security, and the sustainability of feeding a growing population. Unlike most studies focusing on specific growth stages, this study investigated the effects of 35 °C (T35) and 36 °C (T36) on the growth, physiological traits across all growth stages and yield-related traits of four Malaysian rice varieties - Sempadan 303 (S303), Sebernas 307 (S307), UKMRC02 (RC02), and UKMC09 (RC09) – compared to MR219, a high-yielding variety. Elevated temperature observed significant differences in plant height (PH), leaf area index (LAI), 100-filled grain weight (100GW), filled grain (FG), grain to leaf area ratio (GToLAI), and several grain nutrients in rice varieties. LAI correlated positively with PH (R2=0.723**) and stomatal conductance (R2=0.672**). All varieties recorded higher relative chlorophyll content at 126 days after sowing (DAS) surpassing values at 90 DAS and were significantly higher in T36 for MR219 and S303 showing adaptation to elevated temperature. The harvest index was higher in T36 across all varieties, except RC02, which had a lower FG. All varieties showed no significant difference in Mg, Al, and Si, although MR219 and RC09 had lower P and K in T36. Ca was higher in T36 for all varieties except MR219. This study highlights the varied growth, physiological, and yield-related responses of Malaysian rice varieties to elevated temperatures, with MR219, S303, and RC09 showing strong adaptation due to better stress-coping mechanisms such as maintaining higher LAI, 100GW, HI, and Ca, while S307 and RC02 demonstrated susceptibility. Penerbit Universiti Kebangsaan Malaysia 2025 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/25720/1/SML%209.pdf Gomathy Sethuraman, and Normaniza Osman, and Acga, Cheng and Wickneswari Ratnam, and Mohd Razi Ismail, and Nurul Amalina Mohd Zain, (2025) Effect of elevated temperature on the growth, physiological, and yield-related traits of commercial rice in Malaysia. Sains Malaysiana, 54 (5). pp. 1305-1318. ISSN 0126-6039 https://www.ukm.my/jsm/english_journals/vol54num5_2025/contentsVol54num5_2025.html |
| spellingShingle | Gomathy Sethuraman, Normaniza Osman, Acga, Cheng Wickneswari Ratnam, Mohd Razi Ismail, Nurul Amalina Mohd Zain, Effect of elevated temperature on the growth, physiological, and yield-related traits of commercial rice in Malaysia |
| title | Effect of elevated temperature on the growth, physiological, and yield-related traits of commercial rice in Malaysia |
| title_full | Effect of elevated temperature on the growth, physiological, and yield-related traits of commercial rice in Malaysia |
| title_fullStr | Effect of elevated temperature on the growth, physiological, and yield-related traits of commercial rice in Malaysia |
| title_full_unstemmed | Effect of elevated temperature on the growth, physiological, and yield-related traits of commercial rice in Malaysia |
| title_short | Effect of elevated temperature on the growth, physiological, and yield-related traits of commercial rice in Malaysia |
| title_sort | effect of elevated temperature on the growth, physiological, and yield-related traits of commercial rice in malaysia |
| url | http://journalarticle.ukm.my/25720/ http://journalarticle.ukm.my/25720/ http://journalarticle.ukm.my/25720/1/SML%209.pdf |