نتایج جستجو برای: pinus sylvestris

تعداد نتایج: 14058  

2014
Pan Fang Shihui Niu Huwei Yuan Zhexin Li Yuncheng Zhang Lu Yuan Wei Li

UNLABELLED PREMISE OF THE STUDY A set of novel expressed sequence tag (EST) microsatellite markers was developed in Pinus sylvestris var. mongolica to promote further genetic studies in this species. • METHODS AND RESULTS One hundred seventy-five EST-simple sequence repeat (SSR) primers were designed and synthesized for 31,653 isotigs based on P. tabuliformis EST sequences. The primer pair...

Journal: :Tree physiology 2010
Andreas Gruber Stefan Strobl Barbara Veit Walter Oberhuber

We determined the temporal dynamics of cambial activity and xylem cell differentiation of Scots pine (Pinus sylvestris L.) within a dry inner Alpine valley (750 m a.s.l., Tyrol, Austria), where radial growth is strongly limited by drought in spring. Repeated micro-sampling of the developing tree ring of mature trees was carried out during two contrasting years at two study plots that differ in ...

2014
Federico Magnani Beñat Olascoaga eija Juurola Paulo Pinho Petr lukeš Albert Porcar-Castell

Epicuticular waxes influence leaf reflectance, but the spatiotemporal dynamics in their reflectance properties have not been properly characterized, and its consequences remain unknown. In this study, we analysed the seasonal changes in wax reflectance of Scots pine needles. It tended to decrease with needle age and towards lower positions within the canopy. In addition, we also identified a cl...

2017
Richard Whittet Stephen Cavers Joan Cottrell Cristina Rosique-Esplugas Richard Ennos

The ability of a population to genetically adapt to a changing environment is contingent not only on the level of existing genetic variation within that population, but also on the gene flow received from differently adapted populations. Effective pollen-mediated gene flow among plant populations requires synchrony of flowering. Therefore differences in timing of flowering among genetically div...

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 2002
Malle Mandre Hardi Tullus Jaan Klõseiko

The study was aimed at the quantitative evaluation of the temporal and spatial partitioning of non-structural carbohydrates and needle biomass in a canopy of Scots pine (Pinus sylvestris L.) growing in a Myrtillus site type forest stand (predominant in Estonia). The tree canopy was divided into ten equal layers and the material for the spatial partitioning of the investigated characteristics wa...

2013
Eero Nikinmaa

The effects after 25 years of moose browsing on Scots pine stands in Lahemaa National Park were evaluated, emphasizing economic damage. A re-evaluation in 2001 examined stands that had been evaluated in 1975–1976. Moose damage significantly affected the tree species composition which changed over time as pine dominance increased and the number of mixed stands declined. The smaller proportion of...

Journal: :Tree physiology 2001
K Makkonen H S Helmisaari

We determined fine root biomass and production of 15-, 35- and 100-year-old Scots pine (Pinus sylvestris L.) stands during three growing seasons. Fine roots were sampled by the soil core method. Mean (+/- SE) annual fine root biomass of Scots pine in the 15-, 35- and 100-year-old stands was 220 +/- 25, 357 +/- 21 and 259 +/- 26 g m(-2), respectively. Fine root biomass of the understory vegetati...

Journal: :Journal of environmental biology 2008
I Dutkuner N Bilir D Ulusan

This study was carried out in a clonal seed orchard of scots pine (Pinus sylvestris L.), to determine the difference and interaction for reproductive and growth characters among clones and its impact on fertility variation and gene diversity Numbers of female and male strobili, and height and diameter at breast height were studied on six grafts chosen randomly in each of the 27 clones for the p...

2013
Raquel Benavides Sonia G. Rabasa Elena Granda Adrián Escudero José A. Hódar Jordi Martínez-Vilalta Ana M. Rincón Regino Zamora Fernando Valladares

Global change triggers shifts in forest composition, with warming and aridification being particularly threatening for the populations located at the rear edge of the species distributions. This is the case of Scots pine (Pinus sylvestris) in the Mediterranean Basin where uncertainties in relation to its dynamics under these changing scenarios are still high. We analysed the relative effect of ...

Journal: :Annals of botany 2006
Jorge Castro

BACKGROUND AND AIMS The date of emergence may have far-reaching implications for seedling performance. Seedlings emerging early in the growing season often have a greater rate of survival or grow better if early emergence provides advantages with respect to an environmental cue. As a result, the benefits of early emergence may be lost if the environmental stress creating the differences among c...

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