Growth development and resource allocation of Panicum repens (L.) Beauv.

Chandrasena J.P.N.R., . Growth development and resource allocation of Panicum repens (L.) Beauv. pp. 1-3. ISSN 0127-6883

Studies were conducted to compare the growth made by Panicum repens (L.) Beauv. raised from single-node rhizome fragments and planted at different planting dates during January to June 1987. Plantings made in January achieved significantly greater total growth compared with all other plantings. Despite the differences in the amount of growth made at different planting dates each allocated nearly equal resources to shoot (35-40 of total plant weight) and rhizome (34-38 of total plant weight) production after 20 weeks of growth. Following the withering of the mother culm in approximately ten weeks the shoot system of each plant comprised of 3-4 dominant primary tillers and a large number of smaller tillers formed from upturned rhizome apices and lateral buds of rhizomes. After 20 weeks of growth the average length of rhizomes produced was 76.2 cm across the different planting dates and the mean rhizome dry weight was 6.0 g/plant. Production of tillers rhizomes and inflorescences was strongly and adversely affected by an increase in plant density. However a shift in the pattern of dry matter partitioning did not occur as a result of increasing competitive stress. With or without competition from its own population plants allocated 23-29 of their dry weight to rhizome production reflecting the significance of vegetative means of propagation for the plant.

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Abstract

Studies were conducted to compare the growth made by Panicum repens (L.) Beauv. raised from single-node rhizome fragments and planted at different planting dates during January to June 1987. Plantings made in January achieved significantly greater total growth compared with all other plantings. Despite the differences in the amount of growth made at different planting dates each allocated nearly equal resources to shoot (35-40 of total plant weight) and rhizome (34-38 of total plant weight) production after 20 weeks of growth. Following the withering of the mother culm in approximately ten weeks the shoot system of each plant comprised of 3-4 dominant primary tillers and a large number of smaller tillers formed from upturned rhizome apices and lateral buds of rhizomes. After 20 weeks of growth the average length of rhizomes produced was 76.2 cm across the different planting dates and the mean rhizome dry weight was 6.0 g/plant. Production of tillers rhizomes and inflorescences was strongly and adversely affected by an increase in plant density. However a shift in the pattern of dry matter partitioning did not occur as a result of increasing competitive stress. With or without competition from its own population plants allocated 23-29 of their dry weight to rhizome production reflecting the significance of vegetative means of propagation for the plant.

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Item Type:	Article
Additional Information:	4 graphs; 3 tables; 10 ref. Summary (En Malay)
AGROVOC Term:	PANICUM REPENS
AGROVOC Term:	RIZOMAS
AGROVOC Term:	FECHA DE PLANTACION
AGROVOC Term:	POBLACION VEGETAL/ COMPETENCIA BIOLOGICA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:56
URI:	http://webagris.upm.edu.my/id/eprint/20328

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