Summary
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1.
Three major categories of plant idioblasts, viz., excretory, tracheoid and sclerenchymatous, are illustrated and discussed from a comparative morphological point of view.
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2.
Certain aspects of recent ontogenetic investigations on the foliar sclereids of dicotyledons are briefly summarized and the importance of “terminal sclereids” in certain families is examined with reference to the general problem of “pattern” in the development of idioblastic cells.
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3.
The significance of differential and unequational cell divisions in the determination of cellular specificity in plants is briefly discussed with particular reference to idioblasts.
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The present article is based upon an adress given by the author as retiring President of the Botanical Society of America, and has appeared in abbreviated form in Vol. I, No. 4, 1955 of the “Plant Science Bulletin,”
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Foster, A.S. Plant idioblasts: Remarkable examples of cell specialization. Protoplasma 46, 184–193 (1956). https://doi.org/10.1007/BF01248877
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DOI: https://doi.org/10.1007/BF01248877