期刊
TREE PHYSIOLOGY
卷 28, 期 10, 页码 1545-1552出版社
OXFORD UNIV PRESS
DOI: 10.1093/treephys/28.10.1545
关键词
climate change; drought tolerance; maritime pine; polycyclism; provenance trial; tree breeding
类别
资金
- INIAP/ FCT
- LD 4 - Contribuicao para o estudo da variabilidade genetica do pinhal [2001-2004]
To evaluate differences in growth and adaptability of maritime pine (Pinus pinaster Ait.), we studied growth, polycyclism, needle tissue carbon isotope composition (delta C-13) as an estimate of water-use efficiency (WUE) and survival of seven populations at 10 years of age growing in a performance trial at a provenance test site in Escaroupim, Portugal. Six populations were from relatively high rainfall sites in Portugal and southwestern France (Atlantic group), and one Population was front a more and Mediterranean site in Spain. There were significant differences between some populations in total height, diameter at breast height, delta C-13 of bulk needle tissue, polycyclism and survival. A population from central Portugal (Leiria, on the Atlantic coast) was the tallest and had the lowest delta C-13. Overall, the variation in delta C-13 was better explained by the mean minimum temperatures of the coldest month than by annual precipitation at the place of origin. Analyses of the relationships between delta C-13 and growth Or Survival revealed a distinct pattern for the Mediterranean population, with low delta C-13 (and WUE) associated with the lowest growth potential and reduced survival. There were significant negative cot-relations between C and height or survival in the Atlantic group. Variation in polycyclism was correlated with annual precipitation at the place of origin. Some Atlantic populations maintained a high growth potential while experiencing moderate water stress. A detailed knowledge of the relationships between growth, survival and delta C-13 in contrasting environments will enhance our ability to select populations for forestry or conservation.
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