دورية أكاديمية
Low Growth Sensitivity and Fast Replenishment of Non-structural Carbohydrates in a Long-Lived Endangered Conifer After Drought
| العنوان: | Low Growth Sensitivity and Fast Replenishment of Non-structural Carbohydrates in a Long-Lived Endangered Conifer After Drought |
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| المؤلفون: | Urrutia-Jalabert, Rocío, Lara, Antonio, Barichivich, Jonathan, Vergara, Nicolás, Rodriguez, Carmen Gloria, Piper, Frida I. |
| المساهمون: | Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Fondo Nacional de Desarrollo CientÃfico, Tecnológico y de Innovación Tecnológica, FONDECYT: 1130546, 1171496 NE/SE011811/1, 1190927 15110009 3160258, REDI170117, 7818I20003, We thank the National Forest Service (CONAF) for their permission to work in the Alerce Costero National Park and to Mr. Alfredo N??ez and Mrs. Elba Ojeda for their support during fieldwork and their permanent willingness to protect Alerce forests. We also thank Mar?a Paz Pe?a for her assistance during fieldwork and Prof. Jos? D?rner, PI of the Fondecyt Project 1130546, for facilitating soil water content data from FN for the summer 2015-2016. Funding. RU-J acknowledges, the Fondecyt Grant 1171496, the PAI-CONICYT Inserci?n en el Sector Productivo 7818I20003 Grant, the Fondecyt Postdoctoral Grant 3160258, Proyecto REDES ETAPA INICIAL, Convocatoria 2017 REDI170117, the CONICYT/FONDAP 15110009, and the ARBOLES CONICYT-NERC-UK Project NE/SE011811/1. FP acknowledges to FONDECYT Grant 1190927. |
| المصدر: | ISSN: 1664-462X ; Frontiers in Plant Science ; https://hal.science/hal-02927386Test ; Frontiers in Plant Science, 2020, 11, ⟨10.3389/fpls.2020.00905⟩. |
| بيانات النشر: | HAL CCSD Frontiers |
| سنة النشر: | 2020 |
| المجموعة: | HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
| مصطلحات موضوعية: | carbon limitation, drought, Fitzroya cupressoides, non-structural carbohydrates, remobilization, starch, sugars, tree-growth, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology |
| الوصف: | International audience ; There is an ongoing debate on whether a drought induced carbohydrate limitation (source limitation) or a direct effect of water shortage (sink limitation) limit growth under drought. In this study, we investigated the effects of the two driest summers recorded in southern Chile in the last seven decades, on the growth and non-structural carbohydrates (NSC) concentrations of the slow-growing conifer Fitzroya cupressoides. Specifically, we studied the seasonal variation of NSC in saplings and adults one and two years after the occurrence of a 2 year-summer drought at two sites of contrasting precipitation and productivity (mesic-productive vs. rainy-less productive). We also evaluated radial growth before, during and after the drought, and predicted that drought could have reduced growth. If drought caused C source limitation, we expected that NSCs will be lower during the first than the second year after drought. Conversely, similar NSC concentrations between years or higher NSC concentrations in the first year would be supportive of sink limitation. Also, due to the lower biomass of saplings compared with adults, we expected that saplings should experience stronger seasonal NSC remobilization than adults. We confirmed this last expectation. Moreover, we found no significant growth reduction during drought in the rainy site and a slightly significant growth reduction at the mesic site for both saplings and adults. Across organs and in both sites and age classes, NSC, starch, and sugar concentrations were generally higher in the first than in the second year following drought, while NSC seasonal remobilization was generally lower. Higher NSC concentrations along with lower seasonal NSC remobilization during the first post-drought year are supportive of sink limitation. However, as these results were found at both sites while growth decreased slightly and just at the mesic site, limited growth only is unlikely to have caused NSC accumulation. Rather, these results suggest that the ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | hal-02927386; https://hal.science/hal-02927386Test; https://hal.science/hal-02927386/documentTest; https://hal.science/hal-02927386/file/fpls-11-00905.pdfTest |
| DOI: | 10.3389/fpls.2020.00905 |
| الإتاحة: | https://doi.org/10.3389/fpls.2020.00905Test https://hal.science/hal-02927386Test https://hal.science/hal-02927386/documentTest https://hal.science/hal-02927386/file/fpls-11-00905.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.BEC5397B |
| قاعدة البيانات: | BASE |
| DOI: | 10.3389/fpls.2020.00905 |
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