Entries by Peter Minorsky

Protoplast Swelling Requires AUXIN BINDING PROTEIN1

Convincing molecular and biochemical evidence exists that members of the TRANSPORT INHIBITOR RESPONSE1/AUXIN SIGNALING F-BOX PROTEIN (TIR1/AFB) receptor family are auxin receptors that trigger auxin-induced gene expression and hypocotyl growth through enhanced expression of SMALL AUXIN UP RNA genes. These TIR1/AFB members, however, were not the first proteins suggested to be auxin receptors. Earlier research […]

Imaging of Light Absorption and Photosynthesis

Due to its ease of use and noninvasive nature, variable chlorophyll fluorescence techniques have become increasingly popular for estimating photosynthetic parameters. Most measurements of variable chlorophyll fluorescence in complex plant tissues and surface-associated cell assemblages (e.g. biofilms) rely on external measurements with fiber optic or imaging fluorimeters. Such studies assume that different cells in the […]

Suc Signals Induce Etiolated Stem Branching

Plant shoot branching is determined by apical dominance, a process in which the apical bud (shoot tip) inhibits the outgrowth of axillary buds further down the stem to control the number of growing branches. In response to this inhibition, plants have evolved rapid long-distance signaling mechanisms to release axillary buds and replenish the plant with […]

Cell Fate Specification in Arabidopsis Roots

Pattern formation in multicellular organisms is the result of coordinated cell division and cell fate determination. In animals, cell fate is determined mainly by a cell lineage-dependent mechanism, whereas positional information is thought to be the primary determinant of cell fate in plants. Currently, our understanding of cell fate regulation in plants relies mostly on […]

Leaf Photosynthesis and Biomass Accumulation

Improving photosynthetic efficiency is a major target for increasing crop biomass production and yield potential. The canopy photosynthetic efficiency, which is determined by leaf area index, canopy architecture, and leaf photosynthetic properties, plays an important role in determining biomass accumulation. Perhaps because there has been an overemphasis on the photosynthetic properties of leaves rather than […]

A Regulator of Calcium Signatures Revealed

Calcium (Ca2+) is an important cellular second messenger for diverse developmental processes and environmental responses in both plants and animals. Transient increases in cytosolic Ca2+ are activated in plants during a host of environmental and developmental processes, including root growth, stomatal movement, pollen growth, abiotic stress responses, and plant-microbe interactions. The secret as to how […]

Transporter Function and N Use Efficiency

Nitrogen (N) is an essential nutrient that plants require in large amounts for growth and development. In industrial countries, high N fertilization enables maximum crop yields, and in the last 50 years, the use of synthetic N fertilizers has increased dramatically to meet food demands. Improving the efficiency of N uptake and utilization in plants […]