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      Effects of timing of heat stress and drought on growth and quality of barley grains

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      Australian Journal of Agricultural Research
      CSIRO Publishing

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          Abstract

          In order to determine the importance of timing of short periods of high temperature and drought on grain weight and grain quality, a glasshouse experiment was carried out in which Schooner barley was exposed to short periods of heat stress (40˚C for 6 h/day for 5 consecutive days) or drought at early grain filling (10–15 days after anthesis, DAA), mid grain filling (20–25 DAA), or late grain filling (30–35 DAA). Individual grain weight was most sensitive to heat stress and drought treatments imposed early in grain filling and was less sensitive to later treatments. The reduction in grain weight was greater under heat stress (average 13%) than under drought in this study (average 6%). Starch was reduced in amount and quality, especially with early stresses during grain filling, but grain nitrogen percentage was similar between treatments.

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          Author and article information

          Journal
          Australian Journal of Agricultural Research
          Aust. J. Agric. Res.
          CSIRO Publishing
          0004-9409
          1999
          1999
          : 50
          : 3
          : 357
          Article
          10.1071/A98080
          f31f54e8-7395-49a2-a21e-cf10c1f4b732
          © 1999
          History

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