Quantitative studies in early ovule development. II. Intra- and inter-individual variation in <i>Stipa lemmonii</i>

Abstract

In two plants from one population of Stipa lemmonii, variable intercorrelations in ovules changed and variation within ovules increased with development. These changes are a quantitative expression of the increasing complexity that occurs with ontogeny. The results occur whether original data or those adjusted with respect to size (residuals from regression analysis using size as an independent variable) are analyzed, implying that the quantitative changes that occur with development are not dependent on size increase alone. Ovules of the two plants tended to become more different from each other with development, especially when adjusted data were analyzed.