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Sensitivity of Chickpeas (Cicer arietinum) to Hot Temperatures during the Reporductive Period

  • R. J. Summerfield (a1), P. Hadley (a1), E. H. Roberts (a1), F. R. Minchin (a1) and S. Rawsthorne (a1)...

Plants of two genotypes of chickpea (Cicer arietinum), classified as early or late-maturing in the field, and relying either on dinitrogen fixation by nodules or on nitrate-N, were grown in various simulated tropical environments in growth cabinets. Plants were transferred between cabinets at various times so that they experienced either warm (30°C) or hot (35°C) days (both in combination with a typical night temperature of 10°C) for different durations of reproductive growth, after growing in average (30°C day - 10°C night) or warmer than average (30° - 18°C) temperatures for the first 28 days from sowing and then average temperatures until transferred into the hot regime. Diurnal vapour pressure deficits were adjusted so that plants experienced a constant atmospheric relative himidity (70%) in all thermal regimes. The greater the proportion of the reproductive period spent in hot days the smaller the seed yields produced; plants transferred at 50% flowering were almost barren. The implications of these data for breeding chickpeas well adapted to hot environments are discussed.

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A. E. Hall , K. W. Foster & J. G. Waines (1979). Crop adaptation to semi-arid environments. Ecological Studies 34:148179.

M. B. Kirkham (1979). Water relations of wheat alternated between two root temperatures. New Phytologist 82:8996.

J. R. Martineau , J. H. Williams & J. E. Specht (1979). Temperature tolerance in soybeans. II. Evaluation of segregating populations for membrane thermostability. Crop Science 19:7981.

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