Entries by Peter Minorsky

Cytoskeletal Targets of an Auxin Transport Inhibitor

The phytohormone auxin plays critical roles in various plant developmental programs by controlling cell expansion and polarity, as well as organ patterning. Auxin action relies on polar transport through different plant tissues. Auxin transport inhibitors are important tools for understanding auxin-dependent plant development. One mode of auxin transport inhibition involves actin dynamics. A major role […]

Stress-Induced Kinases Rapidly Relocate to Plasmodesmata

Plasmodesmata are membranous pores that span the plant cell wall creating both cytoplasmic and membrane continuums between cells. By interconnecting most cells throughout the entire plant body, plasmodesmata form a symplastic network that supports and controls the movement of molecules from cell to cell, within a given tissue or organ. By regulating intercellular communication, plasmodesmata […]

Insights into a Vascular Plant–Fungal Symbiosis

The land invasion by plants more than 500 million years ago was facilitated by the formation of mutualistic symbioses with fungi, through which the earliest plants gained access to mineral nutrients in exchange for photosynthetically fixed carbon (C). It was long hypothesized that this ancient mycorrhiza-like symbiosis was closely related to, and subsequently evolved into, […]

Smoke and Lettuce Seed Germination

Wildfire smoke contains certain potent bioactive compounds (butenolides) that play a major role in regulating the germination of many plant species, predominantly grasses and shrub species from fire-prone ecosystems but also many non-fire-dependent plants such as rice (Oryza sativa), wild oats (Avena sativa), and lettuce (Lactuca sativa). Karrikinolide (KAR1), a butenolide derived from smoke, exhibits […]

Actin Binding Protein and Negative Gravitropism

Gravity is a key determinant in orienting plant stems for proper growth and development. An intact and dynamic actin cytoskeleton is thought to be important for plants to respond to gravity; however, pharmaceutical treatment and mutant analyses have yielded conflicting results. In Arabidopsis (Arabdopsis thaliana) shoots, for example, pharmacological disruption of the F-actin cytoskeleton formation […]

Heat Stress: Two New Insights

High temperatures caused by climate change are predicted to decrease cereal productivity in many parts of the world. Yield losses due to rising temperatures have already been reported for major cereal crops including maize (Zea mays), wheat (Triticum sp.), and rice (Oryza sativa). These cereals together are the main sources of caloric intake of the […]

Turnip Mosaic Virus is Released into Extracellular Space

Turnip Mosaic Virus (TuMV) is a +RNA virus that belongs to the order Picornavirales. +RNA viruses reorganize the endomembrane system to generate quasi-organelle structures called “viral factories”. In the case of TuMV, these factories are motile vesicles of ~100 nm in diameter that contain the TuMV genome as well as viral and host proteins involved […]