Titlebook: Dispersal Biology of Desert Plants; Karen Rheede van Oudtshoorn,Margaretha W. Rooyen Book 1999 Springer-Verlag Berlin Heidelberg 1999 Anti

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Robin Jones,Clive Maynard,Ian Stewartbracts, calyxes, awns) which cause the whole diaspore to move on the ground and propel the diaspore in a definite direction (McCann 1959). Trypanospermic or boring fruits are examples of antitelechoric dispersal mechanisms and are equipped with a hygroscopic drilling apparatus or with a sharply pointed tip which enables them to penetrate the soil.

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Zoochory,d Shmida 1981; Van der Pijl 1982; Bregman 1988) and is generally associated with forests (Ridley 1930), and tropical and temperate communities (Tiffney 1984), although it is also prevalent in desert communities.

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Autochory,ereas others prevent dispersal and are antitelechoric (Fahn and Werker 1972). Ballistic dispersal, a form of telechoric autochory, occurs when the diaspore is propelled explosively, by a fruit that opens suddenly or by a triplever (Willson et al. 1990). It may be due to tension in dead hygroscopic t

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Restriction of Dispersal Due to Anchorage Mechanisms,ena differ vastly, the advantages conferred to the species by way of anchorage are similar. Myxospermic diaspores form a superficial layer of mucilage upon moistening, while trypanospermic diaspores have the ability to “drill” (bore) their diaspores into the soil.

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