Enhanced levels of vitamin B(6) increase aerial organ size and positively affect stress tolerance in Arabidopsis.

Vitamin B₆ is an essential nutrient in the human diet derived primarily from plant sources. While it is well established as a cofactor for numerous metabolic enzymes, more recently, vitamin B₆ has been implicated as a potent antioxidant. The de novo vitamin B₆ biosynthesis pathway in plants has recently been unraveled and involves only two proteins, PDX1 and PDX2.

Mycorrhizal phosphate uptake pathway in tomato is phosphorus-repressible and transcriptionally regulated.

Plants colonized by arbuscular mycorrhizal (AM) fungi take up phosphate (Pi)via the mycorrhizal and the direct Pi uptake pathway. Our understanding of the molecular mechanisms involved in the regulation of these pathways is just emerging.Here, we have analyzed the molecular physiology of mycorrhizal Pi uptake in the tomato (Solanum lycopersicum) variety Micro-Tom and integrated the data obtained with studies on chemical signaling in mycorrhiza-inducible Pi transporter gene regulation.