Entries by Arif Ashraf

Nitrate modulates stem cell dynamics in Arabidopsis meristems through cytokinins ($) (PNAS)

The SAM (Shoot Apical Meristem) generates the cells that make up the shoot. In this paper, Landrein et al. studied how nutrient availability shapes SAM architecture. They showed that SAM size is positively correlated with both pTCSn::GFP (a cytokinin reporter) and pWUS::GFP (a major regulator for stem cell homeostasis) at various soil conditions. Additionally, they […]

CRootBox: a structural – functional modeling framework for root systems (Ann Bot)

Root architecture is important to understand the response of plants during biotic and abiotic stress conditions. Root growth is mostly under soil, which deprives us of the ability to observe its development and growth pattern. In this paper, Schnepf et al. present CRootBox, a framework developed based on C++ and Python, for root architecture analysis. […]

A toolkit for studying cellular reorganization during early Arabidopsis thaliana embryogenesis (Plant J.) ($)

Embryogenesis is the simple process of plant development, but until recently our knowledge has been limited to how individual cells are specified and organized. Reported markers have been mostly constitutive promoter-driven, a fact that creates background and makes them unsuitable for the study of cellular organization of the embryo. In Liao & Weijers, the authors […]

ARF2 – ARF4 and ARF5 are essential for female and male gametophyte development in Arabidopsis (Plant Cell Physiol.)

Auxin is considered a master molecule for plant growth and development; in a whimsical way, IAA (Indole – 3 – Acetic Acid) has been defined as “Induce Almost Anything”! Auxin-mediated gene expression is regulated by Auxin Responsive Factor (ARFs). The model plant Arabidopsis thaliana contains 23 ARFs. In Liu et al., microRNA-mediated silencing of AtARF2 […]

OsEIL1 affects auxin biosynthesis in ethylene-inhibited rice root elongation

The role of crosstalk between auxin and ethylene in primary root development has been studied in the dicot model plant Arabidopsis thaliana, but is less well understood in monocots. Through a genetic screen for roots that elongate in the presence of ethylene , Qin, Zhang et al. identified a mutant rice ethylene insensitive (rein7-1). REIN7 […]

Identification of a methyltransferase catalyzing the final step of methyl anthranilate synthesis in cultivated strawberry

Methyl anthranilate (MA) is a volatile chemical that contributes to the aroma of strawberry (Fragaria spp.), but several modern varieties do not produce this chemical. Pillet et al. tried to identify the biosynthetic pathway of MA. They compared transcriptomes between MA-producing and non-producing varieties and identified five candidate genes, one of which was predicted to […]

Luminaries: Philip N. Benfey

BY ARIF ASHRAF, ASPB Student Ambassador and Research Student, Cryobio Research Center, Iwate University, Japan (Originally published September 2016) Professor, Duke University, Durham, North Carolina Philip N. Benfey graduated from the University of Paris and received his  PhD in cell and developmental biology from Harvard University under the guidance of Dr. Philip Leder. He did […]