%0 Journal Article
%T Incomplete trimorphic incompatibility expression in Oxalis compacta Gill. ex Hook. et Arn. subsp. compacta in the central Chilean Andes Expresi車n incompleta de incompatibilidad trim車rfica en Oxalis compacta Gill. ex Hook. et Arn. subsp. compacta en los Andes de Chile central
%A MARY T. K ARROYO
%A ANA MAR赤A HUMAˋA
%A DANIELA DOM赤NGUEZ
%A GUS JESPERSEN
%J Gayana. Botanica
%D 2012
%I Universidad de Concepci車n
%X The expression of trimorphic incompatibility was investigated in a high altitude population of Oxalis compacta subsp. compacta distributed in the upper alpine belt (3100-3470 m) of the central Chile Andes. Stigma-anther reciprocity (2 populations), morph representation (7 populations), unassisted selfing capacity and open-pollination fruit set (6 populations) were determined. O. compacta ssp. compacta es highly dependent on external pollinators. Although it has typical tristylous flowers, considerable seed set is possible following illegitimate intermorph and intramorph cross pollination. Open pollination fruit set varied from 9-83% and on average was lower in the higher-elevation populations. The possibility of seed set following two kinds of illegitimate cross pollination is seen as a means of enhancing reproductive output by enabling more effective use of the limited pollinator resource in the high alpine environment, where fruit set shows high inter-annual variability and there is some evidence for pollination limitation in Oxalis compacta subsp. compacta. Se investig車 la expresi車n de incompatibilidad trim車rfica en una poblaci車n de Oxalis compacta subsp. compacta distribuida en la zona alpina superior de los Andes de Chile central. Se determin車 la reciprocidad de los estigmas y anteras (dos poblaciones), representaci車n de morfos florales (7 poblaciones), capacidad para autofecundaci車n no asistida y polinizaci車n abierta (6 poblaciones). O. compacta subsp. compacta es altamente dependiente de polinizadores externos. No obstante la presencia de flores tristilicas, las dos categor赤as ileg赤timas de polinizaci車n dieron semillas. La producci車n de frutos mediante polinizaci車n abierta fluctu車 entre 9-83% y en promedio fue menor en las poblaciones de mayor elevaci車n. Se plantea que la capacidad de formar semillas mediante polinizaci車n ileg赤tima permitir芍 el uso m芍s eficaz del recurso limitado de polinizaci車n en la zona andina superior, donde los niveles de fructificaci車n var赤an entre a os y existe evidencia preliminar de limitaci車n de polen en Oxalis compacta subsp. compacta.
%K Oxalis compacta subsp. compacta
%K relaciones de incompatibilidad trim車rfica
%K alpino superior
%K Andes de Chile central
%K Oxalis compacta subsp. compacta
%K trimorphic incompatibility relationships
%K high alpine
%K central Chilean Andes
%U http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432012000100008