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The Physiological Basis for Yield Differences between Four Genotypes of Groundnut (Arachis Hypogaea) in Response to Drought. III. Developmental Processes

  • D. Harris (a1), R. B. Matthews (a1), R. C. Nageswara Rao (a2) and J.H. Williams (a2)
Abstract
SUMMARY

Rates of leaf development in four groundnut genotypes were found to depend primarily on temperature, although there was a linear relation between the thermal time to produce one leaf and mean leaf water potential below −0.6 MPa. Flower, peg and pod production was analysed in relation to leaf number, since this integrated effects of temperature and water status.

When water was not limited, the ratio of pod number: peg number was about 0.8 for all four genotypes. During drought only one genotype (TMV 2) maintained this value, while for the other genotypes the ratio was approximately 0.15. Genotypes also showed different patterns of development during recovery from drought. TMV 2 maintained relatively high values of partitioning factor throughout the pod-filling period, resulting in the largest harvest index and pod yield. Kadiri 3 achieved the second largest harvest index and pod yield by maintaining production of pegs during drought and only forming pods when stress was relieved.

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This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

T. A. Lee Jr, D. L. Ketring & R. D. Powell (1972). Flowering and growth response of peanut plants (Arachis hypogaea L. var. Starr) at two levels of relative humidity. Plant Physiology 49:190193.

S. K. Leong & C. K. Ong (1983). The influence of temperature and soil water deficit on the development and morphology of groundnut (Arachis hypogaea L.). Journal of Experimental Botany 34:15511561.

C. K. Ong (1984). The influence of temperature and water deficits on the partitioning of dry matter in groundnut (Arachis hypogaea L.). Journal of Experimental Botany 35:746755.

Y. Ono , K. Nakayama & M. Kubota (1974). Effects of soil temperature and soil moisture in podding zone on pod development of peanut plants. Proceedings of the Crop Science Society of Japan 43:247251.

J. E. Pallas Jr, J. R. Stansell & T. J. Koske (1979). Effects of drought on Florunner peanuts. Agronomy Journal 71:853858.

J. B. Passioura (1972). The effect of root geometry on the yield of wheat growing on stored water. Australian Journal of Agricultural Research 23:745752.

C. V. Underwood , H. M. Taylor & C. S. Hoveland (1971). Soil physical factors affecting peanut pod development. Agronomy Journal 63:953954.

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Experimental Agriculture
  • ISSN: 0014-4797
  • EISSN: 1469-4441
  • URL: /core/journals/experimental-agriculture
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