A Palynological- Taxonomic Study of the Genus Asystasia and A Plynological Study of Some Related Genera.. In the Acanthaceae
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Date
1982-06
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Addis Ababa University
Abstract
The pollen morphology of ni neteen s pec i es of Acanthaceae :
nine of A5ystneia and ten of five other genera ha ve been
inves tigated usinG l i ght and/or electron mic roscope s . The
five gener a Gr a p tophyllurn , Jacobini a, Jus t i c i a , Mackays and
~~~ cun be sepa r ated fr om each other by the number and
characte r of a pertur es , exine st r at ifi cat i on and/or by the natur e
of the " trem" a r ea". The study has r evealed tha t the pollen gr ains
of the ge nus H6yst ns i a a r e th r ee - pora te and the surfa ces a r e provi
ded with nine colpoid streaks . The sexine i s smooth. The
spec i es can be separ ated from each other by the di ffe rence i n the
pr omine nce of the colpoi d s treaks and by the nature of t he sexi nUQue
region a r ound the por e .
A detailed study of the pa n- t r opi c al spec i es ~ . gangetica
(L . ) T. hnders . has r esulted in its s ubdivis i on into two geogr
aphic a l s ubspec i es on the basi s of corolla and s tyle and s t i gma
l engths . It i s also s uppor ted by poll en s i ze and seed morphol ogy .
The subspec i es with long coroll a a nd s tyle and s tigma i s desi gna t ed
as subs p . gpnget ica and the one with shor t corol la and style and
sti gma 6ubsp . mic r antha . The distribution of both taxa i s
i llustr ated .
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A Palynological- TaXon0mic Study Of the Ge:nus