NDLI: Leaf and bud demography and shoot growth in evergreen and deciduous trees of central Himalaya, India

Content Provider	Springer Nature Link
Author	Negi, G. C. S.
Copyright Year	2006
Abstract	Leaf and bud demography and shoot growth were studied in 10 evergreen (ES) and 15 deciduous (DS) tree species occurring between 600 and 2200 m elevation in the central Himalayan mountains in India. Results were analyzed to help explain why ES prevail in the vegetation of this region, even though the number of ES is no greater than for DS. Although each species had its own pattern with regard to leaf and bud demography and seasonality of shoot extension and radial growth, it was possible to group the species on the basis of shoot growth phenology. In most species, leaves emerged during March-April, at the onset of warm and dry summer season. The ES recruit leaves in shoots more rapidly than the DS. Across all species, peak number of leaves per shoot (5.8–20.7), peak leaf area per shoot (116.2–1559.2 cm2), peak number of vegetative buds per shoot (1.9–14.5), bud survival per shoot (23–84%), shoot extension growth (6.4–40.8 cm) and shoot extension period (13–30 weeks) varied considerably. The peak leaf area per shoot (587.7 vs. 246.7 cm2) and shoot extension growth (19.3 vs. 11.2 cm) were significantly greater for DS than for ES, and these two functional groups of species were clearly separable with regard to shoot growth characteristics.Results indicate that rapid recruitment of leaf crop in the shoots, longer leaf life-span, and access to ground water due to deep roots were some of the advantages, the ES had over the DS, that may have likely enable them to maintain growth for a longer period in this region of warm winters and longer winter day length as compared to temperate climates. In the shallow rooted DS, shoot growth seems to be much affected by a seasonal drought in winter and they are likely to be affected more in the event of failure of monsoon rains in this region.
Starting Page	416
Ending Page	429
Page Count	14
File Format	PDF
ISSN	09311890
Journal	Trees
Volume Number	20
Issue Number	4
e-ISSN	14322285
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-03-09
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Central Himalaya Deciduous trees Evergreen trees Leaf and bud demography Shoot growth phenology Warm temperate climate Plant Physiology Plant Pathology Plant Anatomy/Development Agriculture Plant Sciences Forestry
Content Type	Text
Resource Type	Article
Subject	Ecology Physiology Plant Science Forestry

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