An analysis of UV-A effects of phytochrome-mediated induction of phenylalanine ammonia-lyase in the cotyledons of Lycopersicon esculentum mill

Lercari, Bartolomeo; Sodi, Francesco; Biagioni, Massimo

doi:10.1016/0098-8472(86)90009-2

Cited by 9 publications

(2 citation statements)

References 17 publications

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“…An important strategy allowing seedling survival during early development is the photoprotection promoted by anthocyanin accumulation in hypocotyls and cotyledons (Chalker‐Scott 1999). It is probable that phytochrome plays a role in these responses (Husaineid et al 2007; Carvalho et al 2010), either through the induction of phenylalanine ammonia‐lyase (PAL) (Lercari et al 1986; Brodenfeldt and Mohr 1988; Alokam et al 2002) or chalcone synthase (CHS) (Frohnmeyer et al 1998; Wade et al 2001), both of which play a crucial role in the anthocyanin biosynthesis pathway (Brödenfeldt and Mohr 1988). However, the mechanism by which phytochromes operate during anthocyanin induction, following irradiation with UV‐B light is still not clear.…”

Section: High‐light Stressmentioning

confidence: 99%

The Role of Phytochrome in Stress Tolerance

Carvalho

Campos

Azevedo

2011

Journal of Integrative Plant Biology

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It is well-documented that phytochromes can control plant growth and development from germination to flowering. Additionally, these photoreceptors have been shown to modulate both biotic and abiotic stress. This has led to a series of studies exploring the molecular and biochemical basis by which phytochromes modulate stresses, such as salinity, drought, high light or herbivory. Evidence for a role of phytrochromes in plant stress tolerance is explored and reviewed.

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Section: High‐light Stressmentioning

confidence: 99%

The Role of Phytochrome in Stress Tolerance

Carvalho

Campos

Azevedo

2011

Journal of Integrative Plant Biology

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“…The overlapping absorption spectra of different interest on the effects of ultraviolet radiation on living photoreceptors, which control the same response in the systems (Tevini andTcramura 1989, Urbach 1989). Da-blue -UV regions of the daylight spectrum, do not maging and non-damaging effects, induced by UV radi-allow adequate conclusions about the nature, role and ation complicate the study of its impact on plant systems interactions among the absorbing pigments (Mohr 1986, (Lercari et al 1986). Gaba andBlack 1987, Lercari ct al.…”

Section: Multiple Mechanisms Of Action (Which Depend On Exper-introdumentioning

confidence: 99%

Photomorphogenic responses to UV radiation: Involvement of phytochrome and UV photoreceptors in the control of hypocotyl elongation in Lycopersicon esculentum

Lercari¹,

Sodi²,

Paola³

1990

Physiologia Plantarum

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The photo-inhibition of Lycopersicon esculentum Mill, hypocotyl growth induced by UV radiation may be mediated by both phytochrome and UV-absorbing receptors. The inhibition of growth induced by continuous irradiation with high fluence rate UV radiation is similar in the au mutant, which is severely deficient in spectrophoto metrically and immunochemically detectable phytochrome, and in the isogenic wild type. Parallel irradiation with 692 nm light, which is equivalent to UV radiation for the phytochrome system in our experimental conditions, induced at high photon fluence rates a significant increase in hypocotyl growth in the au mutant. The same light treatments inhibited the hypocotyl growth of the wild type. The responses of water-grown seedlings and chlorophyll-free seedlings (streptomycin and norflurazon treated seedlings) were compared. Water-grown and chlorophyll-free seedlings responded similarly to UV radiation. The presence of chlorophyll correlates with a significant increase in hypocotyl growth of au mutants irradiated with 692 nm light. These results support the conclusion that UV-induced inhibition of growth in the au mutant is independent of phytochrome.

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