Plant Physiology: On The Inside

Strigolactones Root parasitic weeds, such as broomrape (Orobanche spp.) and witchers weed (Striga spp.), are harmful plants in sub-Saharan Africa, the Middle East, and Asia that maintain seed dormancy in the absence of host plant. Both parasitic plant species require germination stimulants released from…

All organisms including plants share the tetrapyrrole biosynthesis pathway that is critical for the production of compounds such as heme and chlorophyll. During tetrapyrrole biosynthesis, coproporphyrinogen III oxidase (CPO) catalyzes the conversion of coproporphyrinogen III into protoporphyrinogen IX.…

Plant-parasitic cyst nematodes (Heterodera species) are among the most devastating pathogens of plant roots. These obligate parasites initiate a long period of biotic interactions with their host plants where formation of an operative feeding structure, the syncytium, is vital for nematode survival and…

The Mediterranean plant Thapsia garganica (Apiaceae), also known as deadly carrot, produces the highly toxic compound thapsigargin. This compound is a potent inhibitor of the sarcoplasmic-endoplasmic reticulum Ca2+-ATPase calcium pump in mammals and is of industrial importance as the active moiety of…

Environmental signals during seed production are important determinants of seed properties, including seed dormancy and seed longevity. The mother plant plays an important role in this signaling process, collecting signals throughout her life history and modulating dormancy by providing hormones to maturing…

Cryptochromes are flavin-binding proteins that act as blue light receptors in bacteria, fungi, plants and insects and are components of the circadian oscillator in mammals. Animal and plant cryptochromes are evolutionarily divergent, although the unicellular alga Chlamydomonas reinhardtii has both an…

Soybean (Glycine max) is one of the most important oilseed crops that provides edible oil for humans and is a major renewable feedstock for biodiesel production around the world. As such, increasing soybean yield potential has become a long-term breeding objective. Soybean leaf petiole angle is an important…

Within the mitochondrial electron transport chain, complex II (succinate dehydrogenase [SDH]) oxidizes succinate to fumarate by transferring electrons to ubiquinone (UQ), which is reduced to ubiquinol. The enzyme is formed by four subunits: a flavoprotein (SDH1), which contains the FAD cofactor, an iron…