Autochthonous 



Refers to local origin, e.g., an Indigenous species, deposits 

 produced within a lake. cf. Index species f Allochthonous. 



Autoecious 



Refers to parasites which pass all stages of their life-cycle 

 within or on the same host, e.g., certain rust fungi, cf. 

 Heteroecious. 



Autogamy 



(1) Self- or close-pollination leading to self-fertilization 

 in plants, cf. Geitonogamy, Xenogamy, Cleistogamous. (2) 

 Division of the nucleus into two parts followed by the union 

 of these parts in the same cell, occurs in some diatoms and 

 protozoa. 



Autogenic Succession 



A successional series in which one stage modifies the 

 habitat in such a way that it is replaced by another stage, 

 e.g., deciduous forest replacing a pine forest, cf. Allogenic 

 succession, Succession. 



Autolysis 



The dissolution or digestion of an organism or parts 

 thereof by its own enzymes. 



Autonomic 



Refers to processes or activities arising from internal 

 causes, spontaneous, self-governing, e.g. Mutation (q. v.). 



Autonomous 



Refers to organisms, especially plants with chlorophyll, 

 that are Autotrophic (q. v.). Also used as syn. of Autonomic. 



Autophyte 



An Autotrophic plant. 



Autopolyploid 



A Polyploid (q. v.) in which three or more sets of like 



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