Photosynthetic capacity of 15 robusta coffee clones (Coffea canephora)
Gas exchange: net photosynthesis rate (A), transpiration (E), stomatal conductance (gs), CO2 intercellular concentration (Ci) and water use efficiency (WUE=A/E) of 15 different clones of robusta coffee (Coffea canephora) were evaluated. The responses curves of photosynthesis (A) to the photosyntheti...
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| مؤلفون آخرون: | , , , |
| التنسيق: | article |
| اللغة: | spa |
| منشور في: |
2020
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| الموضوعات: | |
| الوصول للمادة أونلاين: | https://revistasespam.espam.edu.ec/index.php/Revista_ESPAMCIENCIA/article/view/206 |
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إضافة وسم | الملخص: | Gas exchange: net photosynthesis rate (A), transpiration (E), stomatal conductance (gs), CO2 intercellular concentration (Ci) and water use efficiency (WUE=A/E) of 15 different clones of robusta coffee (Coffea canephora) were evaluated. The responses curves of photosynthesis (A) to the photosynthetic photon flux density (PFD; A vs PFD) and of A to Ci (A vs Ci) of 6 robusta clones: SICA 1, 2, 3, 4, CONILON 1 and ECU ROBUSTA 01, were assess, in order to obtain information on photosynthetic capacity of robusta coffee. The seedlings were grown in an umbracle, in a completely randomized statistical design in the Botanical garden at Mutile Experimental Station; seedlings were watered every three days and fertilized during the experiment to keep the plants vigorous, in order to guarantee good physiological performance. Gas exchange parameters were significantly differences between clones: A showed values of 9,5 and 15 mmol m-2 s-1, gs (198- 375 mmol m-2 s-1) and WUE varied between 2,6 and 5,8 mmol CO2 mol H2O-1. The highest A and WUE were found in clones (ECU ROBUSTA 01, CONILON 1 and CONILON2). A Significant differences in A vs PFD and A vs Ci curves were found in the ECU ROBUSTA 01, CONILON 1 and SICA’s clones. In conclusion, significant differences found among robusta coffee clones studied, being the ECU ROBUSTA 01, CONILON 1 and SICA 1 clones due to their greater photosynthetic capacity, which could have high productivity in Esmeraldas |
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