Entries by Francesca Resentini

Oxylipins other than jasmonic acid regulate systemic resistance (Plant Cell)

Plant roots communicate with microbes in a sophisticated manner through chemical communication within the rhizosphere, thereby leading to biofilm formation of beneficial microbes and resulting in priming of defence, or induced resistance in the plant host to a wide range of pathogens (induced systemic resistance, ISR). Trichoderma virens is an agriculturally-relevant root-colonizing fungus that provides […]

Protocol for rapid clearing and staining of fixed Arabidopsis ovules for improved imaging by confocal laser scanning microscopy (Plant Methods)

This is a very interesting paper that provide a new, fast and easy protocol, with specific step-by-step instructions, for a trustworthy imaging with cellular resolution of fixed Arabidopsis ovules at different developmental stages. The authors combine two previously outlined techniques: clearing of fixed ovules in ClearSee solution, and marking the cell outline using the cell […]

Challenging current interpretation of sunflower movements (J. Exp. Bot)

Plants are vigorous and sensitive organisms that can move various organs: leaves, shoots, tendrils, flower petals and roots. Movements in plants are usually regarded as a response to an environmental stimulus, such as light, temperature, or gravity. However, plants also are capable of autonomous, endogenous movements without apparent stimuli, and these movements can also exhibit […]

Arabidopsis PP6 phosphatases dephosphorylate PIF proteins to repress photomorphogenesis (PNAS)

In the absence of light, plants undergo skotomorphogenesis, characterized by longer hypocotyls, closed and yellowish cotyledons, and apical hooks. in the presence of light, they undergo photomorphogenesis, with inhibited hypocotyl elongation, and open and expanded green cotyledons. Light also modulates directional growth, shade avoidance, and photoperiodic flowering. One of the most important photoreceptors that perceives […]

Ethylene-mediated nitric oxide depletion pre-adapts plants to hypoxia stress (Nature Comms)

Climate projection models predict an increasingly wetter world with frequent and severe flooding events, causing loss of crops. As it is for other organisms, it is a challenge for plants to stay under water for long periods. However, how plants react to submergence is poorly understood. Environmental perturbations such as submergence are perceived by plants […]

Cannabis glandular trichomes alter morphology and metabolite content during flower maturation ($) (Plant J)

The therapeutic and recreational applications of Cannabis sativa (Cs) attract public and clinical interest thanks to its secondary metabolites (cannabinoids and terpenes) synthesized and stored in glandular trichomes, hair-like epidermal protrusion densely concentrated in the flowers. Little is known about the properties and contributions of the three different types of glandular trichomes present on the […]

Plant cell-surface GIPC sphingolipids sense salt to trigger Ca2+ influx (Nature)

Soil salinity is one of the most important global problems that negatively affect crop productivity. Jiang et al designed a forward genetic screen in A. thaliana to identify the specific ionic response triggered by salt stress. They mutagenized plants expressing the genetically encoded Ca2+ sensor aequorin, looking at individuals with a reduced NaCl-induced cytosolic Ca2+ […]

Molecular mechanisms driving switch behavior in xylem cell differentiation (Cell Reports)

Xylem is involved in the movement of water and mineral nutrients through the plants from the roots to leaves; its cells are not totipotent and undergo programmed cell death. VASCULAR-RELATED NAC-DOMAIN (VND) transcription factors are master switches of xylem cell differentiation in Arabidopsis and much has been learned about their transcriptional regulatory network. However, little […]