Articles
ANALYSIS OF THE RESPONSE OF PHOTOMORPHOGENETIC TOMATO MUTANTS TO END-OF-DAY FAR-RED LIGHT
Article number
305_10
Pages
67 – 78
Language
Abstract
The response was studied to end-of-day (EOD) far-red light (FR) of light-grown plants of: photomorphogenetic mutants aurea (au), high pigment (hp) and double mutant (au,hp); the potential photomorphogenetic mutant procera (pro) and the isogenic wild type of tomato (Lycopersicon esculentum Mill.) cv.
Ailsa Craig.
All of the genotypes tested exhibited a strong EODFR response resulting in an increase in plant height, fresh weight of internodes and in the case of wild-type and hp-mutant plants a reduction in anthocyanin accumulation.
However, it had no effect on their leaf area and chlorophyll content.
Interposing a dark period at the end of the white light photoperiod before exposure to FR demonstrated that 50% of the EODFR response on elongation growth and anthocyanin content was obtained for a dark period of 4 h.
This indicates that the phytochrome species regulating anthocyanin synthesis in the wild type and hp mutant and growth in wild type, au, hp, and au,hp has the same characteristics, being stable in the active FR-absorbing form.
The EODFR response on anthocyanin synthesis, determined by measurement of the anthocyanin content of young leaves at the same physiological stage of development demonstrated that the level of anthocyanin reached a minimum after 5 days EODFR treatment.
The potential of photomorphogenetic mutants, either selected by conventional means or genetically engineered, for the control of plant growth is discussed.
Ailsa Craig.
All of the genotypes tested exhibited a strong EODFR response resulting in an increase in plant height, fresh weight of internodes and in the case of wild-type and hp-mutant plants a reduction in anthocyanin accumulation.
However, it had no effect on their leaf area and chlorophyll content.
Interposing a dark period at the end of the white light photoperiod before exposure to FR demonstrated that 50% of the EODFR response on elongation growth and anthocyanin content was obtained for a dark period of 4 h.
This indicates that the phytochrome species regulating anthocyanin synthesis in the wild type and hp mutant and growth in wild type, au, hp, and au,hp has the same characteristics, being stable in the active FR-absorbing form.
The EODFR response on anthocyanin synthesis, determined by measurement of the anthocyanin content of young leaves at the same physiological stage of development demonstrated that the level of anthocyanin reached a minimum after 5 days EODFR treatment.
The potential of photomorphogenetic mutants, either selected by conventional means or genetically engineered, for the control of plant growth is discussed.
Publication
Authors
J.L. Peters, M.E.L. Schreuder, G.H. Heeringa, J.C. Wesselius, R.E. Kendrick, M. Koornneef
Keywords
anthocyanin, chlorophyll, growth, Lycopersicon, phytochrome
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