Fluorescence induction characteristics of maize inbred lines after long-term chilling treatment during the early phase of development
Material type: ArticlePublication details: 1991ISSN:- 0300-3604
- 93-024232
Item type | Current library | Collection | Call number | Status | Date due | Barcode | Item holds | |
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Article | CIMMYT Knowledge Center: John Woolston Library | AGRIS Collection | 93-024232 (Browse shelf(Opens below)) | Available |
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7 graphs; 23 ref. Summaries (En)
In order to characterize chilling resistance, the fluorescence induction parameters of five different maize inbred lines grown at temperatures ranging from 9 to 18 degrees Celsius (intervals of 1 degree Celsius) were determined. Below 13 degrees Celsius considerable changes occurred with decreasing temperature for each line. In this temperature region a multiple effect of chilling could be observed: the altered values of the different fluorescence indices reflected alterations in pigment contents and arrangement (Fo), the inhibition of electron flow [(Fi-Fo)/Fv], QA reduction (FR) and the loss of photosynthetic quantum yield (Fv/Fm). Fo/Chl, FR and Fv/Fm seemed to characterize the chilling resistance best. An exponential correlation was found between FR and Fv/Fm. On the basis of these fluorescence indices the maize lines examined could be divided into three groups with different chilling sensitivity
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