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Field Crops ResearchVolume 59, Issue 2, 6 November 1998, Pages 81-89

Intraspecific variation in sensitivity to ultraviolet-B radiation in maize grown under field conditions. I. Growth and morphological aspects(Article)

  • Sect. of Biol. and Environ. Eng., Univ. Tras-os-Montes and Alto Douro, 5000 Vila Real, Portugal

Abstract

This study was conducted to determine the growth and morphological effects of UV-B on 8 cultivars of maize (Zea mays L.) in a Mediterranean climate. Dry weight, leaf area, leaf area duration (LAD), ear length, mean relative growth rate (RGR), and mean net assimilation rate (NAR) were significantly reduced by UV-B treatment in some cultivars. Plant height and number of leaves were not affected. Changes in partitioning of biomass and premature leaf senescence were also recorded. Considerable variation in UV-B sensitivity exists within cultivars. DK 498 was the most Sensitive and REG.VR the least sensitive. These genotypic differences suggest that future attempts at breeding for increased tolerance to UV-B radiation might be successful.

Author keywords

Growth analysisMaizeSensitivity rankingUV-B radiation

Indexed keywords

Species Index:Zea mays
  • ISSN: 03784290
  • CODEN: FCRED
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1016/S0378-4290(98)00102-6
  • Document Type: Article

  Correia, C.M.; Section of Biological/Environ. Eng., Univ. of Tras-os-Montes/Alto Douro, Portugal;
© Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.

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