Bud development types as a new macroscopic marker of Norwayspruce decline and recovery processes along a mountainous pollution gradient

0090935 - BÚ 2008 RIV GB eng J - Článek v odborném periodiku
Polák, T. - Albrechtová, Jana - Rock, B. N.
Bud development types as a new macroscopic marker of Norwayspruce decline and recovery processes along a mountainous pollution gradient.
[Vývojové směry pupenů jako nový makroskopický marker regeneračních a degradačních procesů smrku ztepilého podél gradinetu znečištění.]
Forestry. Roč. 79, č. 4 (2006), s. 425-437. ISSN 0015-752X. E-ISSN 1464-3626
Grant CEP: GA ČR(CZ) GD206/03/H137; GA MŠMT(CZ) ME 658
Grant ostatní: GA AV ČR(CZ) KJB6111307; NASA(US) NAG5-5192; NSF(US) NSF108385
Výzkumný záměr: CEZ:AV0Z60050516
Zdroj financování: R - rámcový projekt EK ; V - jiné veřejné zdroje
Klíčová slova: forest ecophysiology * Norway spruce * bud macroscopic marker
Kód oboru RIV: EF - Botanika
Impakt faktor: 0.847, rok: 2006

A new macroscopic marker of decline and recovery processes in Norway spruce ( Picea abies ) based on proportions of bud development types was evaluated in 315 mature trees in two mountainous regions of the Czech Republic. This study was conducted in 1998 at 63 sites located in the Krusne hory Mts, which exhibited a wide range of damage corresponding to a gradient of increasing air pollution load (mainly SO2 and NOx) and the Sumava Mts, a relatively unpolluted area. Proportions of bud development types (regular buds, buds with growth potential and aborted buds) were found to refl ect the current intensity of primary shoot formation in crowns as well as a capability to replace needle loss by formation of secondary shoots via differentiation of buds with growth potential. Using cluster analysis, the trees were classifi ed according to the proportion of individual bud development types into one of three shoot growth categories: accelerated, stabilized or decreased shoot growth. Trees with accelerated shoot growth are characterized by intense production of assimilative organs and a small pool of viable buds with growth potential. Trees with stabilized shoot growth have high potential for crown recovery via activation of abundant buds with growth potential, and trees with decreased shoot growth have high rates of aborted buds, slow primary shoot formation and small pools of buds with growth potential. This new marker refl ects well the forest recovery observed in areas with recent decreases in pollution loads. The results indicate that traditional macroscopic markers such as crown defoliation are less sensitive to the current status of tree crowns when compared with the proportion of individual bud development types. The potential of this new marker for forestry practice and tree physiology is discussed.

Byl ozkoušen nový makroskopický marker procesů obnovy a degradace v koruně smrku ztepilého (Pice abies) na bázi vývojových směrů pupenů. Předložené kritérium klasifikace vývoje pupenů má potenciál pro lesní management, je jednoduše aplikovatelné v terénu a narozdíl od standardních metod určování defoliace koruny umožňuje přesně postihnout procesy obnovy či degradace koruny stromu pod vlivem mnohonásobných stresových faktorů.
Trvalý link: http://hdl.handle.net/11104/0151665