Abstract

Natural selection generally favors plants whose forms and physiology tends to maximize their net rate of growth, because plant uses resource to reproduce and compete for additional space. Above ground characteristics of a plant often greatly affect its competitive abilities and population dynamics rather than below ground because drymass of a plant depends on leaf strategy, where as root in the top soil is responsible for exploitation, competition through depletion of a common pool of resources so fine roots are also important. The use of root/shoot ratios to describe allocation of dry weight to structures for capturing soil resources and light is limited due to other functions of the root and shoot such as storage and support. Dry matter allocation, specific leaf area, root length and different ratios were determined for 17 herb species by extraction of soil cores from an intact forest. Interspecific values of RLA were con- sidered. It has been hypothesized that the co-variation among species in leaf trait and other morphologi- cal adaptations particularly leaf and growth rate reflects a set of mutually supporting traits that interact to determine plant identity in similar climatic conditions.

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