Photosynthetic System II: Racial Differentiation in Typha latifolia

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Science  09 Jun 1967:
Vol. 156, Issue 3780, pp. 1363
DOI: 10.1126/science.156.3780.1363


The rate of reduction of 2,6-dichlorophenol-indophenol by illuminated chloroplasts isolated from ecological races of Typha latifolia was negatively correlated with length of growing season at the site of origin. Efficiency of the photochemical apparatus for this reaction was twice as high in a high-altitude population from Wyoming as in a maritime population from California.