The agricultural potential of selected C<inf>4</inf> plants in arid environments.

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Journal Article
Journal of Arid Environments, 1984, 7 (3), pp. 275 - 286
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Germination responses of Amaranthus hypochondriacus, A. retroflexus and Portulaca oleracea to both temperature and moisture were determined in growth chambers and contrasted with the response of 2 C3 species, Beta vulgaris var. cicla and Chenopodium album. The C4 species had higher germination percentages over the entire range of temperatures studied. Differences in photosynthetic pathway had no effect on moisture requirements for germination. Dry weight yields increased linearly with soil moisture for both the C4 and the C3 species, but the water-use efficiencies of the C4 species were higher at all watering levels investigated. The photosynthetic pathway of each species had no apparent effect on its productivity in relation to soil salinity. The nutritional standing qualities except for consistently high lysine contents. No advantage was found for C4 plants grown in saline soil. -from Authors
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