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Regrowth of Alfalfa After Heat Stress 1
Author(s) -
Pulgar Claudio E.,
Laude Horton M.
Publication year - 1974
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1974.0011183x001400010008x
Subject(s) - medicago sativa , heat stress , biology , shoot , clone (java method) , medicago , horticulture , agronomy , zoology , botany , dna , biochemistry , genetics , gene
The extent and persistence of growth depression in alfalfa ( Medicago sativa L.) following heat stress was established under controlled conditions by comparing stressed with unstressed plants of the same clone. Temperatures were used that simulated the periodic heat extremes of the field. Significant reduction in number and length of shoots in the regrowth was obtained within 7 days of stress. The period of depressed growth was extended as the intensity of stress was increased either by elevating temperature or lengthening exposure time. Measurable reduction in shoot numbers and size persisted up to 6 weeks following a stress which produced no visible evidence of tissue mortality.