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Maize canopy production under contrasted water regimes

journal contribution
posted on 2023-05-16, 22:04 authored by Song, Y, Birch, CJ, Hanan, J
Two field experiments were employed to investigate canopy production in two cultivars of maize (Zea mays), Pioneer 34N43 and Pioneer 31H50, under contrasted water regimes. Plants were sampled at 1–3 day intervals to quantify extension of leaves and internodes. Final lengths of leaf laminae, sheaths and internodes were reduced when the organ extension was exposed to water stress; however, Pioneer 34N43 appeared to be more sensitive than Pioneer 31H50. An effective linear phase by simplifying a four-phase model was used to characterise organ extension in response to water stress. The coordination of the timing of sequential extension events of laminae, sheaths and internodes was preserved under mild water stress, but rates of processes were reduced. The rate of linear extension was principally responsible for reduction in organ length. This study provides robust relationships for use in modelling organ extension and canopy production under mild to moderate water stress.

History

Publication title

Annals of Applied Biology

Volume

157

Pagination

111-123

ISSN

0003-4746

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

Assoc Applied Biologists

Place of publication

C/O Horticulture Research Int Wellsbourne, Warwick, England, Cv35 9Ef

Rights statement

The definitive published version is available online at: http://interscience.wiley.com

Repository Status

  • Restricted

Socio-economic Objectives

Maize

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