Effects of Growing Temperature and Nitrogen Supply on Grain Chalkiness in Rice

Aryan Arun

Research output: Book chapter/Published conference paperConference paperpeer-review

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Grain chalkiness or white patches in rice kernel is a major problem in almost all types of rice, as it lowers the mill-out yield and consumer acceptance. Adverse environmental conditions, particularly higher temperatures during grain filling have been reported to enhance chalkiness. In this study, the effects of two different nitrogen (N) levels and temperature regimes, on the extent of chalk (%) were tested. Interestingly, chalkiness was higher in the high N grown plants, which was further exacerbated by higher temperatures. Thus, in plants grown with higher N with more seed set, the supply and/or synthesis of carbohydrates is the limiting factor that is further impaired at higher temperatures and results in increased proportion of chalky grains. Results from the SEM analysis of starch packaging in endosperm of these grain samples, in relation to chalkiness, are discussed.
Original languageEnglish
Title of host publicationFourth Temperate Rice Conference
EditorsStefano Bocchi, Aldo Ferrero, Andrea Porro
Place of PublicationNovara, ITALY
PublisherTipografia Fiordo s.r.l., Galliate (No), Italy
Number of pages2
ISBN (Electronic)9788895616018
Publication statusPublished - 2007
EventInternational Temperate Rice Conference - Novara, ITALY, Italy
Duration: 25 Jun 200728 Jun 2007


ConferenceInternational Temperate Rice Conference


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