The systematic position of Aegialitis the enigmatic mangrove

Prakash N., . and Lim A.L., . The systematic position of Aegialitis the enigmatic mangrove. pp. 11-15. ISSN 0216-8236

Traditionally assigned to the Plumbaginaceae and regarded as the most primitive in the family the genus Aegialitis is clearly an aberrant member of the family. In some respects it is exceptional among the mangrove plants as well. The genus shows similarities to as well as differences from the two tribes Plumbagineae and Staticeae. Some recognise only one species but others recognise two that show a vicarious distribution. A study of its embryology has revealed that the anthers are tetrasporangiate the tapetum is of the secretory type with binucleate cells and the pollen grains are tricolpate and 3-celled at shedding. The ovules are circinotropous bitegmic and crassinucellate. The configuration of the mature female gametophyte resembles that of the Polygonum type with prominent synergids which suggests that it is different again from the distinct patterns seen in the two existing tribes and lends further support to the proposal to assign it to an independent tribe if not as a family of its own

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Abstract

Traditionally assigned to the Plumbaginaceae and regarded as the most primitive in the family the genus Aegialitis is clearly an aberrant member of the family. In some respects it is exceptional among the mangrove plants as well. The genus shows similarities to as well as differences from the two tribes Plumbagineae and Staticeae. Some recognise only one species but others recognise two that show a vicarious distribution. A study of its embryology has revealed that the anthers are tetrasporangiate the tapetum is of the secretory type with binucleate cells and the pollen grains are tricolpate and 3-celled at shedding. The ovules are circinotropous bitegmic and crassinucellate. The configuration of the mature female gametophyte resembles that of the Polygonum type with prominent synergids which suggests that it is different again from the distinct patterns seen in the two existing tribes and lends further support to the proposal to assign it to an independent tribe if not as a family of its own

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Item Type:	Article
Additional Information:	Summary (En)
AGROVOC Term:	PLUMBAGINACEAE
AGROVOC Term:	TAXONOMIA
AGROVOC Term:	ANTERA
AGROVOC Term:	ANATOMIA DE LA PLANTA
AGROVOC Term:	DESARROLLO EMBRIONARIO
AGROVOC Term:	MANGLES
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:57
URI:	http://webagris.upm.edu.my/id/eprint/20992

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