Tagged: jasmonates

Chitin-induced nepenthesin activity in the pitcher fluid of Nepenthes alata.

Prey-induced responses in carnivorous Nepenthes

Carnivorous plants of the genus Nepenthes catch and digest prey, mainly arthropods, in their pitcher traps in order to obtain additional nutrients such as nitrogen and phosphate. The digestive character of the pitcher fluid is well known; other features of the fluid are less well understood, in particular the induction and regulation of its composition. Here, Yilamujiang et al. study the induction of both phytohormones and digestion-related genes in the pitcher of Nepenthes alata. The authors demonstrate that insect prey as well as chitin is able to induce first jasmonate phytohormones which in turn can induce genes for digestive enzymes...

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Vitamin E, phosphorus availability and longevity in arabidopsis

Vitamin E helps to control the cellular redox state by reacting with singlet oxygen and preventing the propagation of lipid peroxidation in thylakoid membranes. Both plant ageing and phosphorus deficiency can trigger accumulation of reactive oxygen species, leading to damage to the photosynthetic apparatus. Simancas and Munné-Bosch investigate how P availability and vitamin E interact in the control of longevity in Arabidopsis thaliana, and find that plants tend to use vitamin E for a protective, anti-senescing role under moderate or high P levels, but vitamin E paradoxically reduces longevity under severe P starvation. Complex interactions are revealed between P availability,...

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