Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 549148
Title Phytochrome a protects tomato plants from injuries induced by continuous light
Author(s) Velez-Ramirez, Aaron I.; Vreugdenhil, Dick; Millenaar, Frank F.; Ieperen, Wim van
Source Frontiers in Plant Science 10 (2019). - ISSN 1664-462X
Department(s) Horticulture & Product Physiology
Laboratory of Plant Physiology
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) Continuous light - Far-red light - Photosynthesis down-regulation - Phytochrome - Solanum lycopersicum - Tomato

Plants perceive and transduce information about light quantity, quality, direction and photoperiod via several photoreceptors and use it to adjust their growth and development. A role for photoreceptors has been hypothesized in the injuries that tomato plants develop when exposed to continuous light as the light spectral distribution influences the injury severity. Up to now, however, only indirect clues suggested that phytochromes (PHY), red/far-red photoreceptors, are involved in the continuous-light-induced injuries in tomato. In this study, therefore, we exposed mutant and transgenic tomato plants lacking or over-expressing phytochromes to continuous light, with and without far-red light enrichment. The results show that PHYA over-expression confers complete tolerance to continuous light regardless the light spectrum. Under continuous light with low far-red content, PHYB1 and PHYB2 diminished and enhanced the injury, respectively, yet the effects were small. These results confirm that phytochrome signaling networks are involved in the induction of injury under continuous light. HIGHLIGHTS-PHYA over-expression confers tolerance to continuous light regardless the light spectrum.-In the absence of far-red light, PHYB1 slightly diminishes the continuous light-induced injury.-Continuous light down-regulates photosynthesis genes in sensitive tomato lines.

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