Date published: 2025-11-26

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PhyA Activators

PhyA activators are a category of compounds that target and modulate the activity of Phytochrome A (PhyA), which is a photoreceptor protein found in plants. PhyA is sensitive to light, particularly in the red and far-red spectrum, and plays a pivotal role in regulating plant development in response to light signals - a process known as photomorphogenesis. This includes seed germination, stem elongation, leaf expansion, and the flowering process.

The activation of PhyA occurs through the absorption of light, which induces a conformational change in the protein leading to its active form. PhyA activators work by promoting this light-dependent activation, either by directly affecting the photoreceptor's light-sensing domain or by influencing the signal transduction pathway downstream of PhyA. These activators may bind to PhyA, thus stabilizing the active form of the protein or facilitating its interaction with downstream signaling components. Alternatively, they might increase the plant's sensitivity to light or amplify the signal cascade initiated by PhyA activation. Understanding the activation mechanisms of PhyA is a significant area of research in plant biology as it provides insights into how plants adapt to their light environment and how they coordinate their growth and developmental processes accordingly. By studying PhyA activators, researchers can dissect the pathways by which light influences plant development at the molecular level.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Gibberellic acid

77-06-5sc-257556
sc-257556A
sc-257556B
sc-257556C
500 mg
1 g
5 g
25 g
$46.00
$62.00
$142.00
$505.00
2
(0)

Promotes de-etiolation in plants, which can complement PhyA-induced responses by stimulating growth and development pathways that PhyA also influences.

3-Indoleacetic acid

87-51-4sc-254494
sc-254494A
sc-254494B
5 g
25 g
100 g
$30.00
$90.00
$157.00
4
(1)

As an auxin, it can modulate gene expression and growth in a manner that is synergistic with PhyA signaling, enhancing the overall photomorphogenic response.

Sodium nitroprusside dihydrate

13755-38-9sc-203395
sc-203395A
sc-203395B
1 g
5 g
100 g
$42.00
$83.00
$155.00
7
(1)

Releases nitric oxide (NO), which can act as a secondary messenger in plants, potentially influencing PhyA signaling pathways by modulating protein kinases and phosphatases that control PhyA activity.

6-Benzylaminopurine

1214-39-7sc-202428
sc-202428A
1 g
5 g
$20.00
$51.00
(1)

A synthetic cytokinin that can affect cell division and differentiation, potentially enhancing the PhyA-mediated growth responses.

Kinetin

525-79-1sc-207780
sc-207780A
1 g
5 g
$37.00
$47.00
(0)

Another synthetic cytokinin that can promote cell division and influence PhyA-related growth and developmental processes.

trans-Zeatin

1637-39-4sc-222365
sc-222365A
5 mg
10 mg
$53.00
$91.00
(0)

A natural cytokinin that can stimulate growth and chloroplast development, processes that are also regulated by PhyA signaling.

Brassinolide

72962-43-7sc-391736
sc-391736A
2 mg
10 mg
$104.00
$332.00
2
(1)

A brassinosteroid that can promote stem elongation and cell expansion, which are influenced by PhyA activation during de-etiolation.

Salicylic acid

69-72-7sc-203374
sc-203374A
sc-203374B
100 g
500 g
1 kg
$46.00
$92.00
$117.00
3
(1)

Involved in plant defense responses, can also influence growth and development, potentially interacting with PhyA-mediated pathways to modulate photomorphogenesis.

(±)-Jasmonic Acid

77026-92-7sc-205355
sc-205355A
sc-205355B
sc-205355C
sc-205355D
sc-205355E
100 mg
250 mg
1 g
5 g
10 g
50 g
$94.00
$124.00
$194.00
$1642.00
$3274.00
$13780.00
(0)

A plant hormone that regulates growth and stress responses, could modulate PhyA signaling by influencing the expression of genes that respond to PhyA activation.

(+)-cis,trans-Abscisic acid

21293-29-8sc-202103
sc-202103A
500 µg
1 mg
$105.00
$188.00
(0)

Though typically associated with stress responses and dormancy, it can interact with light signaling pathways, possibly affecting PhyA-mediated processes indirectly.