Traditionally, the production of hybrid maize seed involved the removal of male flowers to prevent self-fertilization of the female flowers. Rice produces bisexual flowers, so mechanical emasculation is not as amenable. Therefore, hybrid rice production requires that the female parent be genetically male sterile. There are several tactics to achieve this including conditional male sterility […]
Although it is widely accepted that high humidity has a strong influence on plant diseases of the phyllosphere (the above-ground portions of the plant), the molecular basis is not understood. Xin et al. report that an important step in bacterial infection of the phyllosphere is a pathogen-driven humidity-dependent establishment of an aqueous intercellular space (apoplast). The authors […]
When villagers see the marauding hordes approaching, they secure their food sources. Similarly, when the cell-surface FLS2 receptor detects a bacterial pathogen, it (through its co-receptor BAK1) phosphorylates and stimulates the activity of a cell-surface sugar transporter (STP13), leading to the uptake into the plant cell of apoplastic sugars, thus depriving the pathogen of food […]
Videos are excellent ways to communicate about plant science. They can stimulate curiosity, explain a complicated idea, or make the invisible visible. Here is a curated list of some of our favorite short plant science videos. Crash Course Biology: Plant Cells (10 min), Photosynthesis (13 min), The Sex Lives of Nonvascular Plants (10 min), Vascular […]
November of this year marked the 50th anniversary of the official release of IR8, the “miracle rice” that changed the world. The rice, developed at IRRI (International Rice Research Institute) greatly increased yields compared to other varieties of the time, and is thought to have saved the lives millions of people who would otherwise have […]
The wavelenghts of light perceived by a plant are information-rich, and plants integrate information from photoreceptors tuned to different wavelenghts to optimize their growth and development. Because plants absorb red light but not far-red light, a low ratio of red to far-red light indicates vegetative shading and promotes an elongation response; the ratio of red […]
A seedling in the dark produces ethylene, which in a dicot such as Arabidopsis leads to apical hook formation that protects the cotyledons from damage as the seedling pushes through the soil. The emergence of the seedling into the soil causes a rapid transition to photomorphogenesis and a suppression of the ethylene-mediated apical hook. Shi […]
Seed vitality is critical for plants’ evolutionary survival and food production by economic crops such as rice, wheat, etc. Seed formation is preceded by well-coordinated events involving mainly fertilization, endosperm and seed coat formation in chronological order. How is the signal relayed from one event to another to make seeds? Is this signal maternally or […]
Youssef et al. investigate how the vsr2 mutant affects inflorescence (spike) development in barley. In the two-row variety, at each node there are two sterile spikelets and a single grain forms. In the six-row variety, each of the spikelets is fertile and three grains form at each node. The vsr2 mutation partially converts the two-row […]