First-pass extracted concept

phytochrome B

Candidate: concept label1 source documents4 linked claims

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Aliases

phyB

Extracted Explainers

What the tool is doing

Phytochrome B is the photoreceptor implicated by the abstract in mediating the differential hypocotyl elongation response to red R-CPL versus red L-CPL. The paper also measured CD spectra and photoreaction behavior of an Arabidopsis phyB sensory module.

Source 1DOI PubMed

Resources required

The abstract references use of a phyB-deficient Arabidopsis mutant and measurements on a sensory module of Arabidopsis phyB.

Source 1DOI PubMed

What problem it solves

In this study, phyB provides a mechanistic explanation for at least part of the observed CPL-dependent plant responses.

Source 1DOI PubMed

What it does not solve

The abstract states that the CPL effects likely involve phyB along with other photoreceptors and the photosynthetic process, so phyB alone does not fully explain all effects.

Source 1DOI PubMed

Evidence Snippets

This difference was not observed when a phytochrome B (phyB) deficient mutant of Arabidopsis was irradiated, suggesting that inhibition of elongation by red R-CPL was mediated by phyB.

Evidence 1Source 1DOI PubMedprovenance

Supporting Sources

Source 1primary paper2020Plant BiotechnologyDOI PubMed

1 evidence snippet 4 linked claims Claim 1 Claim 2 Claim 3

Linked Claims

Claim 1mechanistic inferencesupports2020Source 1DOI PubMed

The observed circularly polarized light effects likely involve phyB together with other photoreceptors and the photosynthetic process.

Quoted textsource-backed

These findings suggest that these CPL effects involve phyB, along with other photoreceptors and the photosynthetic process.

Claim 2mechanistic inferencesupports2020Source 1DOI PubMed

The stronger inhibition of hypocotyl elongation by red right-handed circularly polarized light was not observed in a phyB-deficient Arabidopsis mutant, supporting involvement of phytochrome B.

Quoted textsource-backed

This difference was not observed when a phytochrome B (phyB) deficient mutant of Arabidopsis was irradiated, suggesting that inhibition of elongation by red R-CPL was mediated by phyB.

Claim 3negative resultsupports2020Source 1DOI PubMed

Left- and right-handed circularly polarized light did not differ in their ability to induce interconversion of the red light-absorbing and far-red light-absorbing forms of phyB.

Quoted textsource-backed

L-CPL and R-CPL, however, did not differ in their ability to induce the interconversion of the red light-absorbing and far-red light-absorbing forms of phyB.

Claim 4spectroscopic observationsupports2020Source 1DOI PubMed

The red light-absorbing form of phyB showed negative circular dichroism in the red light-absorbing region.

Quoted textsource-backed

The red light-absorbing form of phyB showed a negative CD in the red light-absorbing region, consistent with the results of germination, inhibition of hypocotyl elongation and biomass production.