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Temperature accumulation and physiological ageing of seed potato tubers
Author(s) -
JENKINS P. D.,
GILLISON T. C.,
ALSAIDI A. S.
Publication year - 1993
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1993.tb04040.x
Subject(s) - biology , canopy , ageing , crop , horticulture , yield (engineering) , agronomy , botany , materials science , metallurgy , genetics
Summary Tubers of cv. Maris Bard were allowed to accumulate different numbers of day‐degrees early, late or continuously throughout the seed storage period. Sprout growth, time of emergence, development of early canopy cover and early tuber yield were increased more by late temperature accumulation than by increasing the number of day‐degrees experienced from 250 up to a maximum of 700°C days. The relative physiological age of seed, as indicated by the subsequent rate of early crop growth, was poorly related to the number of day‐degrees accumulated. The implications for the quantification of seed physiological age are discussed.