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KMID : 0903619840250040277
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Journal of the Korean Society for Horticultural Science
1984 Volume.25 No. 4 p.277 ~ p.282
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The Dry Matter Distribution Between Shoot and Roots of Cucumber (Cucumis sativus L.) and Pepper (Capsicum annuum L.) Plants in Response to Root Pruning , and Different Levels of Nitrogen and Calcium
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Abstract
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The functional equilibrium equations between shoot and roots have been so far concerned with leafy plants such as perennial ryegrass lacking stem during the vegetative growth stage. However, the presence of stem may play an important role in adaptation strategies of pleats under the environmental stresses. The present study was designed to examine fibs significance of structural arrangement of stem in pepper and cucumber plants after imposing root pruning, and nitrogen and calcium deficiencies.
The results obtained are as follows;
1) Pruning root in pepper plant by 70 or 50% increased shoot/root ratio but restored its ariginal value at about 20 days after pruning. Root pruning also significantly reduced the leaf weight ratio (LWR) while consequently maintaining the highest value of stem weight ratio (SWR).
2) The root system of cucumber plant grown in low-nitrogen showed the lowest shoot/root ratio due to the marked increase in root length. Low nitrogen level significantly reduced the value of SWR while low calcium did not show any difference compared to full nutrition treatment. However, low nitrogen level increased the value of LWR while low calcium treatment showed higher values of LWR than full nutrition treatment.
3) It seems reasonable that the inclusion of stem in the shoot weight when considering the functional relationship between the above and below ground parts of the plant is justified.
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KEYWORD
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