Plant response to light and stress

In ever-changing environmental conditions, the regulation of plant growth and development relies on precisely orchestrated cues provided by plant hormones. Two papers in the August 1 issue of Genes & Development highlight the importance of phytohormones, and lend valuable insight into the molecular mechanisms underlying plants responses to light and stress.

BIG link between light signaling and auxin transport

Researchers from the Salk Institute have discovered an enormous link between light and auxin signal transduction pathways 560 kiloDaltons, to be exact.

It was first noticed in the late1920s that changes in levels of the plant hormone, auxin, occur during light-regulated growth responses (ie., the phototrophic response, or the tendency of plants to grow towards the source of light). Until recently, though, genetic evidence linking plants response pathways to light and auxin has been lacking.

Dr. Joanne Chory and colleagues discovered that two previously identified Arabidopsis muatnts doc1, which displays abnormal expression of light-regulated genes, and tir3, known for its resistance to inhibitors of auxin transport are actually two alleles of the same gene. This gene encodes a 560kD protein, which they aptly named "BIG." This work is of interest not only because BIG effectively bridges the gap between auxin- and light-mediated responses, but also due to the similarity that BIG displays to the Calossin gene family found in worm, flies and humans.

Putting out the fire: a role for IP3 in plant cell signaling

Researchers at the University of Arizona have made a significant advance in understanding how plants respond to stress.

The plant hormone abscisic acid (ABA) coordinates plant developmental programs with specific environmental stress responses by activating the expression of stress-adaption genes. Dr. Jian-Kang Zhu and colleagues have discovered that the molecule IP3 (inositol 1, 4, 5-triphosphat

Contact: Nora Poppito
Cold Spring Harbor Laboratory

Page: 1 2

Related biology news :

1. Plants will not save us from greenhouse gases
2. Plant pathologists meeting in Anaheim, CA to discuss agricultural security, food safety, and more
3. Plant gene discovery could enhance plant growth, reduce fertilizer needs and phosphate pollution
4. Plant respiration not just an evolutionary leftover, study shows
5. Canadian Society of Agronomy partners with Plant Management Network
6. Plant pathologists look to forensics to aid in biosecurity
7. Plants for the future: A European vision for plant biotechnology towards 2025
8. Plant pathologists to discuss the future of organic farming
9. Plant pathologists to meet in Anaheim, CA to discuss agricultural security, food safety, and more
10. Plant-like enzyme acts as key life cycle switch in malaria parasite
11. Plant disease under the homeland security microscope

Post Your Comments:

(Date:8/5/2020)... ... , ... Regenative Labs has received approval from the Centers for Medicare & ... first Wharton’s jelly allografts to be assigned a Q code and be approved for ... Wharton’s jelly allograft product to be recognized as a 361 HCT/P by CMS regulated ...
(Date:7/18/2020)... ... July 16, 2020 , ... A study has been published ... Neoasis™ active noise control device to attenuate typical noises in a simulated neonatal ... the alarm sounds from patient monitors, ventilators and other bedside devices that would ...
(Date:7/2/2020)... ... July 01, 2020 , ... AltruBio Inc. http://www.altrubio.com ... a biologic for the treatment of steroid-refractory acute graft-versus-host disease (SR-aGVHD), at European ... J Martin of the Fred Hutchinson Cancer Research Center, this single-arm, open-label Phase ...
Breaking Biology News(10 mins):
(Date:8/12/2020)... FARMS, Mich. (PRWEB) , ... August 12, 2020 ... ... Consulting Group, Inc. (EMMA International), a global leader in FDA compliance consulting ... of the nation’s fastest-growing private companies. The list represents a unique look at ...
(Date:8/3/2020)... (PRWEB) , ... August 03, 2020 , ... ... collection, today announced Jim Corrigan, President and CEO has been named one of ... broad cross-section of industry sectors, PharmaVoice 100 honorees are selected based on how ...
(Date:7/31/2020)... ... July 29, 2020 , ... R3 Stem Cell International is ... $3950. With 50 million stem cells total, patients may choose which extremities they would ... for arthritic joints (BMC Musculoskelet Disord. 2016). At R3 International, umbilical cord tissue is ...
(Date:7/31/2020)... ... July 29, 2020 , ... ... transmitter systems that can be configured to drive Klystrons, TWTs, IOTs, and magnetrons. ... drive one or two switches in a push-pull configuration; yielding fast fall time ...
Breaking Biology Technology:
Cached News: