Cambial activity and annual rhythm of xylem production of elephant apple tree (<Emphasis Type="Italic">Dillenia indica</Emphasis> Linn.) in relation to phenology and climatic factor growing in sub-tropical wet forest of northeast India |
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Authors: | N Venugopal M G Liangkuwang |
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Institution: | (1) Department of Botany, School of life sciences, North Eastern Hill University, Shillong, 793022, Meghalaya, India |
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Abstract: | The interrelationship between phenological events, climatic factors, periodicity of cambial activity and seasonal production
of xylem was examined in Dillenia indica L. (Dilleniaceae) growing in sub-tropical wet forest of Meghalaya state, India. The reactivation of cambial activity was
seen in the first week of May, 15 days after sprouting of new leaves and buds. The activity of cambium and xylem production
gradually declined toward December and ceased from January to April end. There was correlation between leaf fall and cambial
dormancy. It was evident from the correlation and regression analysis, the relationship between cambial activity, xylem production
with climatic factors, the monthly mean minimum temperature plays an important role for the cambial activity and xylem production
rather than influence by rainfall and relative humidity in D. indica L. The data were discussed in the light of cambial activity, xylem production and phenological events. |
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Keywords: | Dillenia indica L Vascular cambium Annual rhythm of xylem production Sub-tropical wet forest Multiple (partial) regression analysis Northeast India |
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