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Determination of Differences in Chilling Susceptibility of Two Soybean Varieties by Means of in vivo Chlorophyll Fluorescence Measurements
Author(s) -
Neuner G.,
Larcher W.
Publication year - 1990
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1990.tb00788.x
Subject(s) - fluorescence , chlorophyll fluorescence , maple , quenching (fluorescence) , in vivo , chlorophyll , coefficient of variation , chemistry , botany , horticulture , biology , chromatography , optics , physics , microbiology and biotechnology
Chilling susceptibility of two soybean varieties, i.e. cv. Maple Arrow and cv. Evans , in the vegetative state (V 3.0) was determined by measuring in vivo chlorophyll fluorescence of leaves exposed to low positive temperatures. In the more susceptible variety Maple Arrow quite distinct deviations from the reference fluorescence data are seen at temperatures between 6.5 and 4.8°C, but not until 5.5. to 2.5°C in the variety Evans. Fluorescence characteristics, i.e. the fluorescence decrease Rfd, the appearance of low‐waves, the photochemical quenching coefficient at steady‐state and the initial slope of the non‐photochemical quenching coefficient qNP indicate that the two varieties differ in their susceptibility by about 1‐2°C at this stage of development. Our results suggest that measurement of in vivo chlorophyll fluorescence might serve as a suitable rapid monitoring method of pre‐screening soybean varieties for chilling susceptibility, as required in plant breeding.