Constraints in the allocation to growth, defences and tolerance to frost stress in Maritime pine
| العنوان: | Constraints in the allocation to growth, defences and tolerance to frost stress in Maritime pine |
|---|---|
| المؤلفون: | Lario, F., Zas Arregui, Rafael, Sampedro Pérez, Luis, Chambel Santos, María Regina |
| المصدر: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| بيانات النشر: | Instituto Nacional de Investigaciones Agrarias (España), 2014. |
| سنة النشر: | 2014 |
| الوصف: | Resumen del trabajo presentado en la 5th International Conference on Mediterranean Pines (Medpine5), celebrada en Solsona (España) del 22 al 26 de septiembre de 2014. Phenotypic characterization of forest reproductive material (FRM) is a key step for establishing recommendations of use. Traditionally, the suitability of FRMs to a given deployment area has been determined upon the assessment of survival and growth traits in common garden tests. However, others vital functions such reproduction and resistance/tolerance to biotic and abiotic stresses may be also highly relevant for survival and regeneration, especially under the predicted increases of biotic and abiotic threats associated to global change. Because resources are limited, theory predicts that all these functions can not be maximized at a time, and thus selecting the best growers could be translated to reduced allocation of resources to defensive mechanisms against biological threats and reduced frost tolerance. In the present work we studied the relationships between growth parameters, constitutive allocation to chemical defenses and needle frost sensitivity in a collection of 25 Maritime pine (Pinus pinaster Ait.) FRMs established in several common garden tests. This series of genetic trials was established for searching for alternative FRMs to be use in the Interior area of Northwestern Spain, a transitional region between Atlantic and Mediterranean climates. Growth in terms of height and diameter at the root-collar was assessed at the age of 6 years old in 8 field trials established within this interior area. Non-volatile resin and polyphenolics were determined at age 7 in both stems and needles in a subsample of trees and FRMs in two field trials with contrasting environments. Previously, at age 4 years, FRMs were tested for their needle sensitivity to frost damage through artificial freezing at -16oC. A negative strong relationship at the FRM level was found between non-volatile resin in needles and needle frost resistance (r = -0.78, p = 0.02), and marginal relationships were observed between diameter growth and non-volatile resin in needles (r = -0.56, p = 0.15) and needle frost resistance (r = 0.65, p = 0.08). Results showed up that FRMs originating from the coastal areas allocated more resources to defense against foliar pathogens and herbivores but showed less frost tolerance and reduced diameter growth. On the other hand, Mediterranean and Continental FRMs, originating from Central Spain were more tolerant to frost but showed low concentrations of chemical defences in the needles that may led them more susceptible to biotic damage. |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::bd0e71951479a11b557b8258bc69dc74 http://hdl.handle.net/10261/171317 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.dedup.wf.001..bd0e71951479a11b557b8258bc69dc74 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |