NDLI: Growth characteristics of root-shoot relations of three birch seedlings raised under different water regimes

Content Provider	Springer Nature Link
Author	Quoreshi, A M
Copyright Year	2003
Abstract	Three birch species (Betula ermanii, B. maximowicziana, B. platyphylla var. japonica) widespread in northern Japan were raised under different water regimes (ca. 23, 35, and 60%) to study root-shoot increment and gas exchange traits in relation to their habitat preferences in natural conditions. Total biomass of all birches was larger for medium, wet and dry treatment. Maximum root length of B. platyphylla raised at dry or wet condition was higher than other species. Root growth rate of three birches peaked around mid July to early September while shoot growth rate was found maximum between late June and mid August. Root growth of three birches was suppressed under dry and wet treatment, especially for B. ermanii. Allocation percentage of biomass to roots of three birches ranged from 30 to 40% but it mainly allocated to elongate the root length under dry and wet condition. Fine roots of B. ermanii and B. maximowicziana under wet condition were distributed mainly on soil surface. In the dry treatment, B. platyphylla allocated photosynthates to elongate the root length and fine root production (<2 mm) and had highest plasticity of roots to different water conditions among the three birches. Specific leaf area (SLA) of three birches decreased with decreasing soil moisture content. Plasticity in SLA of B. platyphylla was found largest. Net photosynthetic rate (Pn) and water use efficiency (WUE) of B. platyphyllashowed highest among all the treatments. Leaf nitrogen content of B. platyphyllawas also relatively higher under different water conditions as compared to the other two birch species, suggesting B. platyphylla may enable to invade to various growing conditions with different water regimes.
Starting Page	303
Ending Page	310
Page Count	8
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	255
Issue Number	1
e-ISSN	15735036
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2003-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecology Plant Sciences Plant Physiology Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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