Genome-Wide Identification and Expression Analysis of the Cyclic Nucleotide-Gated Channel Gene Family in under Salt Stress.

Salt stress severely inhibits plant growth. Understanding the mechanism of plant salt tolerance is highly important to improving plant salt tolerance. Previous studies have shown that nonselective cyclic nucleotide-gated ion channels () play an important role in plant salt tolerance.

Identification of Shaker Potassium Channel Family Members and Functional Characterization of in Suggest That Contributes to Cold Resistance.

is an excellent shade-tolerant warm-season turfgrass. Its poor cold resistance severely limits its promotion and application in temperate regions. Mining cold resistance genes is highly important for the cultivation of cold-resistant .

Screening of environmental stimuli for the positive regulation of stomatal aperture in centipedegrass.

Grasslands, the largest carbon pool in China, possess enormous potential for carbon sequestration. Increasing the stomatal aperture to increase the CO absorption capacity is a potential method to improve plant photosynthetic efficiency and ultimately enhance the carbon sequestration capacity of grass plants. Research on stomatal aperture regulation has focused mostly on Arabidopsis or crops, while research on grass plants in these areas is scarce, which seriously restricts the implementation of this grassland carbon sequestration strategy.

An appropriate ammonium: nitrate ratio promotes the growth of centipedegrass: insight from physiological and micromorphological analyses.

Reasonable nitrogen fertilizer application is an important strategy to maintain optimal growth of grasslands, thereby enabling them to better fulfil their ecological functions while reducing environmental pollution caused by high nitrogen fertilizer production and application. Optimizing the ammonium (NH ):nitrate (NO ) ratio is a common approach for growth promotion in crops and vegetables, but research on this topic in grass plants has not received sufficient attention. Centipedegrass, which is widely used in landscaping and ecological protection, was used as the experimental material.

Regulation of Cytosolic pH: The Contributions of Plant Plasma Membrane H-ATPases and Multiple Transporters.

Cytosolic pH homeostasis is a precondition for the normal growth and stress responses in plants, and H flux across the plasma membrane is essential for cytoplasmic pH control. Hence, this review focuses on seven types of proteins that possess direct H transport activity, namely, H-ATPase, NHX, CHX, AMT, NRT, PHT, and KT/HAK/KUP, to summarize their plasma-membrane-located family members, the effect of corresponding gene knockout and/or overexpression on cytosolic pH, the H transport pathway, and their functional regulation by the extracellular/cytosolic pH. In general, H-ATPases mediate H extrusion, whereas most members of other six proteins mediate H influx, thus contributing to cytosolic pH homeostasis by directly modulating H flux across the plasma membrane.

The rectification control and physiological relevance of potassium channel OsAKT2.

AKT2 potassium (K+) channels are members of the plant Shaker family which mediate dual-directional K+ transport with weak voltage-dependency. Here we show that OsAKT2 of rice (Oryza sativa) functions mainly as an inward rectifier with strong voltage-dependency and acutely suppressed outward activity. This is attributed to the presence of a unique K191 residue in the S4 domain.

Functional and Regulatory Characterization of Three AMTs in Maize Roots.

Maize grows in nitrate-dominated dryland soils, but shortly upon localized dressing of nitrogen fertilizers, ammonium is retained as a noticeable form of nitrogen source available to roots. Thus in addition to nitrate, the absorption of ammonium can be an important strategy that promotes rapid plant growth at strong nitrogen demanding stages. The present study reports the functional characterization of three root-expressed ammonium transporters (AMTs), aiming at finding out functional and regulatory properties that correlate with efficient nitrogen acquisition of maize.

Functional Characterization of the Ammonium Transporter AtAMT1;3 With the Emphasis on Structural Determinants of Substrate Binding and Permeation Properties.

AtAMT1;3 is a major contributor to high-affinity ammonium uptake in roots. Using a stable electrophysiological recording strategy, we demonstrate in oocytes that AtAMT1;3 functions as a typical high-affinity NH uniporter independent of protons and Ca. The findings that AtAMT1;3 transports methylammonium (MeA, a chemical analog of NH ) with extremely low affinity ( in the range of 2.

Function and Regulation of Ammonium Transporters in Plants.

Ammonium transporter (AMT)-mediated acquisition of ammonium nitrogen from soils is essential for the nitrogen demand of plants, especially for those plants growing in flooded or acidic soils where ammonium is dominant. Recent advances show that AMTs additionally participate in many other physiological processes such as transporting ammonium from symbiotic fungi to plants, transporting ammonium from roots to shoots, transferring ammonium in leaves and reproductive organs, or facilitating resistance to plant diseases via ammonium transport. Besides being a transporter, several AMTs are required for the root development upon ammonium exposure.