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Seed Composition, Seedling Emergence and Early Seedling Vigour of Red Kidney Bean Seed Produced at Elevated Temperature and Carbon Dioxide.

Authors :
Thomas, J. M. G.
Prasad, P. V. V.
Boote, K. J.
Allen Jr., L. H.
Source :
Journal of Agronomy & Crop Science. Apr2009, Vol. 195 Issue 2, p148-156. 9p. 2 Charts, 3 Graphs.
Publication Year :
2009

Abstract

Understanding the influence of growth temperature and carbon dioxide (CO2) on seed quality in terms of seed composition, subsequent seedling emergence and early seedling vigour is important under present and future climates. The objective of this study was to determine the combined effects of elevated temperature and CO2 during seed-filling of parent plants on seed composition, subsequent seedling emergence and seedling vigour of red kidney bean ( Phaseolus vulgaris). Plants of cultivar ‘Montcalm’, were grown at daytime maximum/nighttime minimum sinusoidal temperature regimes of 28/18 and 34/24 °C at ambient CO2 (350 μmol mol−1) and at elevated CO2 (700 μmol mol−1) from emergence to maturity. Seed size and seed composition at maturity and subsequent per cent emergence, early seedling vigour (rate of development) and seedling dry matter production were measured. Elevated CO2 did not influence seed composition, emergence, or seedling vigour of seeds produced either at 28/18 or 34/24 °C. Seed produced at 34/24 °C had smaller seed size, decreased glucose concentration, but significantly increased concentrations of sucrose and raffinose compared to 28/18 °C. Elevated growth temperatures during seed production decreased the subsequent per cent emergence and seedling vigour of the seeds and seedling dry matter production of seed produced either at ambient or elevated CO2. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09312250
Volume :
195
Issue :
2
Database :
Academic Search Index
Journal :
Journal of Agronomy & Crop Science
Publication Type :
Academic Journal
Accession number :
36816830
Full Text :
https://doi.org/10.1111/j.1439-037X.2008.00348.x