Impact of water stress on early reproductive growth and development of Morinda citrifolia L. under rubber ecosystem

Subahir S., . and Mahmud C.H., . and Hawa Z.J., . and Mohd Zabawi A.G., . and Md.Noh I., . (2002) Impact of water stress on early reproductive growth and development of Morinda citrifolia L. under rubber ecosystem. [Proceedings Paper]

Imposition of stress during early establishment of Morinda citrifolia L. delayed time to first appearance of both primary and secondary fruitlets. However long duration stress for 332 days did not appear to reduce biomass per plant production. Significant reduction in yield weight per plant was observed from the long duration of well-watered plot implicating the sensitiveness of Morinda citrifolia L. to continuous watering at field capacity. Best production of biomass came from treatments with short duration of well water or stress which promoted both reproductive growth and development. Early establishment of Morina citrifolia L. was also tolerant to short duration water indicated by the unaffected in leaf water potentials among treatments. However long stress duration reduced the water potentials very significantly to -1.59 MPa compared to non-stressed plants at -0.39 MPa. Rewatering of short-term stress enhanced resumption of plants to normal water potential reaching close to field capacity at -0.57 MPa whilst sressing well watered plants immediately reduced the water potential similar to that of the stressed plants at -0.88 MPa. Rewatering of long duration stressed plants however showed the ability to osmotic adjustments in Morinda citrifolia L. Changes in reproductive growth and development and leaf water potentials resulted from short and long stress water deficit or abundance duration are further discussed.

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Abstract

Imposition of stress during early establishment of Morinda citrifolia L. delayed time to first appearance of both primary and secondary fruitlets. However long duration stress for 332 days did not appear to reduce biomass per plant production. Significant reduction in yield weight per plant was observed from the long duration of well-watered plot implicating the sensitiveness of Morinda citrifolia L. to continuous watering at field capacity. Best production of biomass came from treatments with short duration of well water or stress which promoted both reproductive growth and development. Early establishment of Morina citrifolia L. was also tolerant to short duration water indicated by the unaffected in leaf water potentials among treatments. However long stress duration reduced the water potentials very significantly to -1.59 MPa compared to non-stressed plants at -0.39 MPa. Rewatering of short-term stress enhanced resumption of plants to normal water potential reaching close to field capacity at -0.57 MPa whilst sressing well watered plants immediately reduced the water potential similar to that of the stressed plants at -0.88 MPa. Rewatering of long duration stressed plants however showed the ability to osmotic adjustments in Morinda citrifolia L. Changes in reproductive growth and development and leaf water potentials resulted from short and long stress water deficit or abundance duration are further discussed.

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Item Type:	Proceedings Paper
Additional Information:	3 ill. 12 ref.
AGROVOC Term:	DROUGHT STRESS
AGROVOC Term:	REPRODUCTIVE PERFORMANCE
AGROVOC Term:	RUBBER
AGROVOC Term:	RUBBER CROPS
AGROVOC Term:	MORINDA CITRIFOLIA
AGROVOC Term:	MALAYSIA
Geographical Term:	MALAYSIA
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 05:13
URI:	http://webagris.upm.edu.my/id/eprint/10990

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