Entries by Nanxun Qin

Ca2+-dependent processing of immunomodulatory peptides ($) (Science)

Plants are sessile organisms that have evolved an extraordinary immune system to optimally adapt to the risky environment, which includes hazards such as insect chewing, weather damaging, and pathogen invasion. But the signaling mechanism of how the physical damage of cells triggers the intracellular defense response remains to be elucidated. Recently Hander el al. demonstrated […]

A direct connection between PSI & PSII systems in green plants (Plant Cell Physiol)

Plants often optimize their development according to the prevailing environmental conditions, of which light is one of the most important. Arabidopsis uses a PSI-PSII megacomplex as the photosystem reaction center, to transfer the excessive energy from PSII to PSI rapidly. Recently, Yokono et al. proposed that sun-plants may accumulate more PSI-PSII megacomplex than shade-plants to […]

Four auxin-like compounds can selectively regulate plant development (PNAS)

Plants have developed their own strategies to ensure developmental plasticity, such as the use of phytohormones. The phytohormone auxin affects multiple aspects of plant development. Auxin is perceived via a co-receptor complex called TIR1/AFB-AUX/IAA, and SCF TIR1/AFB degrades AUX/IAA proteins to liberate the downstream transcription factors, leading to the auxin response. However, the degradation rate […]

BSL family members are employed by pathogen as “moles” in S. tuberosum (Plant Physiol)

To secure food availability for the world population, plant scientists study the interactions between crop species and pathogens. Plants have robust defense strategies that they employ when attacked. On the other hand, microbes have multiple strategies to manipulate host functions to suppress these defenses and/or enhance the growth of the microbe. Recently Turnbull et al. […]

Two opposing pathways independently regulate symbiotic nodulation in Medicago truncatula ($) (Plant Physiol)

To optimize usage of nutrient, legumes utilize multiple strategies to regulate root nitrogen-fixing symbiotic nodulation. Excessive nodulation may hamper plant’s normal growth, so fine-tuning it is important for plant survival. Laffont et al. report that there are two independent pathways systematically regulating symbiotic nodulation in Medicago truncatula. They found that Super Numeric Nodule (SUNN) and […]

Two novel repressors of photomorphogenesis act downstream of HY5 in Arabidopsis (Plant Physiol)

Higher plants rely on a sophisticated photo-sensory system to cope with the vast variety of environmental stimuli. Under light conditions, young seedlings display photomorphogenic development to maxize the usage of light. Recently, YQ Heng et al. discovered two B-box containing proteins, BBX30 and BBX31, can repress photomorphogenesis in Arabidopsis. The central positive regulator ELONGATED HYPOCOTYL […]

ERF19 buffers Arabidopsis pattern-triggered immunity (J Exp Bot)

To fight off invading pathogens, higher plants such as Arabidopsis are intrinsically programmed with a subset of defense responses known as pattern-triggered immunity (PTI). However, excessive defense responses may hamper plant’s normal growth, so fine-tuning PTI is important for plant survival. Recently, Pin-Yao et al. report that a member of the ethylene response factor called […]

Chloroplast status can affect shade avoidance in plants ($) (Plant Cell)

For optimal photosynthetic performance, plants utilize multiple strategies to compete with their neighbors. Especially when light supply is limited in the canopy, plants promote their own elongation to overgrow neighboring plants. This occurs as a response to a low ratio of Red to Far-Red light (R/FR), in a process called the Shade Avoidance Syndrome (SAS). […]