Rubber Genotypes with Contrasting Drought Factor Index Revealed Different Mechanisms for Drought Resistance in <i>Hevea brasiliensis</i>
It is predicted that drought will be more frequent and sustained in the future, which may affect the decline of rubber tree production. Therefore, it is critical to research some of the variables related to the drought-resistance mechanism of the rubber tree. As a result, it can be used to guide the...
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MDPI AG
2022-12-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/11/24/3563 |
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| author | Andi Nur Cahyo Rudi Hari Murti Eka Tarwaca Susila Putra Fetrina Oktavia Sigit Ismawanto Pascal Montoro |
| author_facet | Andi Nur Cahyo Rudi Hari Murti Eka Tarwaca Susila Putra Fetrina Oktavia Sigit Ismawanto Pascal Montoro |
| author_sort | Andi Nur Cahyo |
| collection | DOAJ |
| description | It is predicted that drought will be more frequent and sustained in the future, which may affect the decline of rubber tree production. Therefore, it is critical to research some of the variables related to the drought-resistance mechanism of the rubber tree. As a result, it can be used to guide the selection of new rubber drought-resistance clones. The goal of this study was to identify drought-resistance mechanisms in rubber clones from the high drought factor index (DFI) group using ecophysiological and biochemical variables. The treatments consist of two factors, namely water deficit and contrasting clones based on the DFI variable. The first factor consisted of three levels, namely normal (fraction of transpirable soil water (FTSW) > 0.75), severe water deficit (0.1 < FTSW < 0.20), and recovery condition (FTSW > 0.75 after rewatering). The second factor consisted of seven clones, namely clones G239, GT1 (low DFI), G127, SP 217, PB 260 (moderate DFI), as well as G206 and RRIM 600 (high DFI). RRIM 600 had the highest DFI among the other clones as a drought-tolerance mechanism characteristic. Furthermore, clones RRIM 600, GT1, and G127 had lower stomatal conductance and transpiration rate than drought-sensitive clone PB 260. As a result, as drought avoidance mechanisms, clones RRIM 600, GT1, and G127 consume less water than clone PB 260. These findings indicated that clone RRIM 600 was a drought-resistant clone with drought tolerance and avoidance mechanisms. |
| first_indexed | 2024-03-09T15:56:40Z |
| format | Article |
| id | doaj.art-9ef690ad19474eb69593a2bb05010c7e |
| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-09T15:56:40Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-9ef690ad19474eb69593a2bb05010c7e2023-11-24T17:29:27ZengMDPI AGPlants2223-77472022-12-011124356310.3390/plants11243563Rubber Genotypes with Contrasting Drought Factor Index Revealed Different Mechanisms for Drought Resistance in <i>Hevea brasiliensis</i>Andi Nur Cahyo0Rudi Hari Murti1Eka Tarwaca Susila Putra2Fetrina Oktavia3Sigit Ismawanto4Pascal Montoro5Indonesian Rubber Research Institute, Sembawa, Banyuasin 30953, IndonesiaDepartment of Agronomy, Faculty of Agriculture, Universitas Gadjah Mada, Yogyakarta 55281, IndonesiaDepartment of Agronomy, Faculty of Agriculture, Universitas Gadjah Mada, Yogyakarta 55281, IndonesiaIndonesian Rubber Research Institute, Sembawa, Banyuasin 30953, IndonesiaIndonesian Rubber Research Institute, Sembawa, Banyuasin 30953, IndonesiaCIRAD, UMR AGAP Institut, F-34398 Montpellier, FranceIt is predicted that drought will be more frequent and sustained in the future, which may affect the decline of rubber tree production. Therefore, it is critical to research some of the variables related to the drought-resistance mechanism of the rubber tree. As a result, it can be used to guide the selection of new rubber drought-resistance clones. The goal of this study was to identify drought-resistance mechanisms in rubber clones from the high drought factor index (DFI) group using ecophysiological and biochemical variables. The treatments consist of two factors, namely water deficit and contrasting clones based on the DFI variable. The first factor consisted of three levels, namely normal (fraction of transpirable soil water (FTSW) > 0.75), severe water deficit (0.1 < FTSW < 0.20), and recovery condition (FTSW > 0.75 after rewatering). The second factor consisted of seven clones, namely clones G239, GT1 (low DFI), G127, SP 217, PB 260 (moderate DFI), as well as G206 and RRIM 600 (high DFI). RRIM 600 had the highest DFI among the other clones as a drought-tolerance mechanism characteristic. Furthermore, clones RRIM 600, GT1, and G127 had lower stomatal conductance and transpiration rate than drought-sensitive clone PB 260. As a result, as drought avoidance mechanisms, clones RRIM 600, GT1, and G127 consume less water than clone PB 260. These findings indicated that clone RRIM 600 was a drought-resistant clone with drought tolerance and avoidance mechanisms.https://www.mdpi.com/2223-7747/11/24/3563drought factor indexdrought resistance<i>Hevea brasiliensis</i>transpirationleaf gas exchange |
| spellingShingle | Andi Nur Cahyo Rudi Hari Murti Eka Tarwaca Susila Putra Fetrina Oktavia Sigit Ismawanto Pascal Montoro Rubber Genotypes with Contrasting Drought Factor Index Revealed Different Mechanisms for Drought Resistance in <i>Hevea brasiliensis</i> Plants drought factor index drought resistance <i>Hevea brasiliensis</i> transpiration leaf gas exchange |
| title | Rubber Genotypes with Contrasting Drought Factor Index Revealed Different Mechanisms for Drought Resistance in <i>Hevea brasiliensis</i> |
| title_full | Rubber Genotypes with Contrasting Drought Factor Index Revealed Different Mechanisms for Drought Resistance in <i>Hevea brasiliensis</i> |
| title_fullStr | Rubber Genotypes with Contrasting Drought Factor Index Revealed Different Mechanisms for Drought Resistance in <i>Hevea brasiliensis</i> |
| title_full_unstemmed | Rubber Genotypes with Contrasting Drought Factor Index Revealed Different Mechanisms for Drought Resistance in <i>Hevea brasiliensis</i> |
| title_short | Rubber Genotypes with Contrasting Drought Factor Index Revealed Different Mechanisms for Drought Resistance in <i>Hevea brasiliensis</i> |
| title_sort | rubber genotypes with contrasting drought factor index revealed different mechanisms for drought resistance in i hevea brasiliensis i |
| topic | drought factor index drought resistance <i>Hevea brasiliensis</i> transpiration leaf gas exchange |
| url | https://www.mdpi.com/2223-7747/11/24/3563 |
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