Dynamics of photosynthetic responses in 10 rubber tree (Hevea brasiliensis) clones in Colombian Amazon: Implications for breeding strategies
The rubber tree [Hevea brasiliensis (Willd. Ex Adr. de Juss.) Muell.-Arg] is the main source of natural rubber in the world. However, in the Amazon region, its production is reduced by biotic and abiotic limitations, which have prompted breeding programs in order to identify desirable agronomic and...
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| creator | Sterling, Armando Rodríguez, Natalia Quiceno, Esther Trujillo, Faiver Clavijo, Andrés Suárez-Salazar, Juan Carlos |
| description | The rubber tree [Hevea brasiliensis (Willd. Ex Adr. de Juss.) Muell.-Arg] is the main source of natural rubber in the world. However, in the Amazon region, its production is reduced by biotic and abiotic limitations, which have prompted breeding programs in order to identify desirable agronomic and physiological indicators. The objective of this study was to analyze the temporal dynamics of photosynthetic responses based on the parameters of leaf gas exchange and chlorophyll a fluorescence in 10 rubber tree clones during the immature phase (pre-tapping) in three large-scale clone trials, during daily cycles and under two climatic periods (dry and rainy) in the Caquetá region (Colombian Amazon). The variables A, LT, ΦPSII, ETR and qP were significantly higher in the dry period, where the highest values of PAR, AT and VPD were seen. In San Vicente del Caguán and Florencia, the highest averages were estimated for A, E and gs, as compared with Belén de los Andaquíes. In Florencia, the highest fluorescence parameters of chlorophyll a were recorded. At 9:00 h and 12:00 h, the highest means of A, E, ΦPSII and ETR were observed. The majority of the clones displayed the highest Fv/Fm mean (0.82-0.84) in the dry period. The clones FX 4098, FDR 4575, MDF 180, GU198 and FDR 5788 represent genotypes with the best photosynthetic performance (greater photosynthetic rates and better ability of the photosynthetic apparatus to capture, use and dissipate light energy). These desirable genotypes constitute a promising gene pool for expanding the genetic resource of rubber trees in the Colombian Amazon. |
| doi_str_mv | 10.1371/journal.pone.0226254 |
| format | Article |
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Ex Adr. de Juss.) Muell.-Arg] is the main source of natural rubber in the world. However, in the Amazon region, its production is reduced by biotic and abiotic limitations, which have prompted breeding programs in order to identify desirable agronomic and physiological indicators. The objective of this study was to analyze the temporal dynamics of photosynthetic responses based on the parameters of leaf gas exchange and chlorophyll a fluorescence in 10 rubber tree clones during the immature phase (pre-tapping) in three large-scale clone trials, during daily cycles and under two climatic periods (dry and rainy) in the Caquetá region (Colombian Amazon). The variables A, LT, ΦPSII, ETR and qP were significantly higher in the dry period, where the highest values of PAR, AT and VPD were seen. In San Vicente del Caguán and Florencia, the highest averages were estimated for A, E and gs, as compared with Belén de los Andaquíes. In Florencia, the highest fluorescence parameters of chlorophyll a were recorded. At 9:00 h and 12:00 h, the highest means of A, E, ΦPSII and ETR were observed. The majority of the clones displayed the highest Fv/Fm mean (0.82-0.84) in the dry period. The clones FX 4098, FDR 4575, MDF 180, GU198 and FDR 5788 represent genotypes with the best photosynthetic performance (greater photosynthetic rates and better ability of the photosynthetic apparatus to capture, use and dissipate light energy). These desirable genotypes constitute a promising gene pool for expanding the genetic resource of rubber trees in the Colombian Amazon.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0226254</identifier><identifier>PMID: 31830108</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Adaptation, Physiological ; Agricultural production ; Agronomy ; Algorithms ; Analysis ; Biology and Life Sciences ; Breeding ; Chlorophyll ; Chlorophyll A - metabolism ; Cloning ; Colombia ; Dynamic tests ; Efficiency ; Elastomers ; Energy dissipation ; Environmental conditions ; Fluorescence ; Gas exchange ; Gene pool ; Genes ; Genotypes ; Hevea - physiology ; Hevea - radiation effects ; Hevea brasiliensis ; Natural rubber ; Parameters ; Photosynthesis ; Photosynthetic apparatus ; Physical Sciences ; Physiological aspects ; Physiology ; Plant Breeding - methods ; Plant Leaves - physiology ; Plant Leaves - radiation effects ; Research and Analysis Methods ; Rubber ; Rubber trees ; Seasonal variations ; Trees</subject><ispartof>PloS one, 2019-12, Vol.14 (12), p.e0226254-e0226254</ispartof><rights>COPYRIGHT 2019 Public Library of Science</rights><rights>2019 Sterling et al. 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These desirable genotypes constitute a promising gene pool for expanding the genetic resource of rubber trees in the Colombian Amazon.</description><subject>Adaptation, Physiological</subject><subject>Agricultural production</subject><subject>Agronomy</subject><subject>Algorithms</subject><subject>Analysis</subject><subject>Biology and Life Sciences</subject><subject>Breeding</subject><subject>Chlorophyll</subject><subject>Chlorophyll A - metabolism</subject><subject>Cloning</subject><subject>Colombia</subject><subject>Dynamic tests</subject><subject>Efficiency</subject><subject>Elastomers</subject><subject>Energy dissipation</subject><subject>Environmental conditions</subject><subject>Fluorescence</subject><subject>Gas exchange</subject><subject>Gene pool</subject><subject>Genes</subject><subject>Genotypes</subject><subject>Hevea - physiology</subject><subject>Hevea - radiation effects</subject><subject>Hevea brasiliensis</subject><subject>Natural rubber</subject><subject>Parameters</subject><subject>Photosynthesis</subject><subject>Photosynthetic apparatus</subject><subject>Physical Sciences</subject><subject>Physiological aspects</subject><subject>Physiology</subject><subject>Plant Breeding - 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Ex Adr. de Juss.) Muell.-Arg] is the main source of natural rubber in the world. However, in the Amazon region, its production is reduced by biotic and abiotic limitations, which have prompted breeding programs in order to identify desirable agronomic and physiological indicators. The objective of this study was to analyze the temporal dynamics of photosynthetic responses based on the parameters of leaf gas exchange and chlorophyll a fluorescence in 10 rubber tree clones during the immature phase (pre-tapping) in three large-scale clone trials, during daily cycles and under two climatic periods (dry and rainy) in the Caquetá region (Colombian Amazon). The variables A, LT, ΦPSII, ETR and qP were significantly higher in the dry period, where the highest values of PAR, AT and VPD were seen. In San Vicente del Caguán and Florencia, the highest averages were estimated for A, E and gs, as compared with Belén de los Andaquíes. In Florencia, the highest fluorescence parameters of chlorophyll a were recorded. At 9:00 h and 12:00 h, the highest means of A, E, ΦPSII and ETR were observed. The majority of the clones displayed the highest Fv/Fm mean (0.82-0.84) in the dry period. The clones FX 4098, FDR 4575, MDF 180, GU198 and FDR 5788 represent genotypes with the best photosynthetic performance (greater photosynthetic rates and better ability of the photosynthetic apparatus to capture, use and dissipate light energy). These desirable genotypes constitute a promising gene pool for expanding the genetic resource of rubber trees in the Colombian Amazon.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>31830108</pmid><doi>10.1371/journal.pone.0226254</doi><orcidid>https://orcid.org/0000-0002-9955-9175</orcidid><oa>free_for_read</oa></addata></record> |
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| source | MEDLINE; DOAJ Directory of Open Access Journals; Public Library of Science (PLoS) Journals Open Access; EZB-FREE-00999 freely available EZB journals; PubMed Central; Free Full-Text Journals in Chemistry |
| subjects | Adaptation, Physiological Agricultural production Agronomy Algorithms Analysis Biology and Life Sciences Breeding Chlorophyll Chlorophyll A - metabolism Cloning Colombia Dynamic tests Efficiency Elastomers Energy dissipation Environmental conditions Fluorescence Gas exchange Gene pool Genes Genotypes Hevea - physiology Hevea - radiation effects Hevea brasiliensis Natural rubber Parameters Photosynthesis Photosynthetic apparatus Physical Sciences Physiological aspects Physiology Plant Breeding - methods Plant Leaves - physiology Plant Leaves - radiation effects Research and Analysis Methods Rubber Rubber trees Seasonal variations Trees |
| title | Dynamics of photosynthetic responses in 10 rubber tree (Hevea brasiliensis) clones in Colombian Amazon: Implications for breeding strategies |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-27T11%3A01%3A10IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-gale_plos_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Dynamics%20of%20photosynthetic%20responses%20in%2010%20rubber%20tree%20(Hevea%20brasiliensis)%20clones%20in%20Colombian%20Amazon:%20Implications%20for%20breeding%20strategies&rft.jtitle=PloS%20one&rft.au=Sterling,%20Armando&rft.date=2019-12-12&rft.volume=14&rft.issue=12&rft.spage=e0226254&rft.epage=e0226254&rft.pages=e0226254-e0226254&rft.issn=1932-6203&rft.eissn=1932-6203&rft_id=info:doi/10.1371/journal.pone.0226254&rft_dat=%3Cgale_plos_%3EA608456602%3C/gale_plos_%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2325306426&rft_id=info:pmid/31830108&rft_galeid=A608456602&rft_doaj_id=oai_doaj_org_article_0bf6eafd9ec54a2c8c5289466f2a3bac&rfr_iscdi=true |