Postembryonic organ formation in higher plants relies on the activity of stem cell niches in shoot and root meristems where differentiation of the resident cells is repressed by signals from surrounding cells. We searched for mutations affecting stem cell maintenance and isolated the semidominant l28 mutant, which displays premature termination of the shoot meristem and differentiation of the s...

Most organs of flowering plants develop postembryonically from groups of pluripotent cells called meristems [1]. The shoot apical meristem (SAM) is specified by two complementary pathways [2-4]. SHOOT MERISTEMLESS (STM; [5]) defines the entire SAM region [6]. WUSCHEL (WUS), on the other hand, functions in a more restricted set of cells to promote stem-cell fate and is regulated by the CLAVATA g...

BACKGROUND Up to 25% of stroke patients wake up with a neurological deficit, so called wake-up stroke (WUS). Different imaging approaches that may aid in the selection of patients likely to benefit from reperfusion therapy are currently under investigation. The magnetic resonance imaging (MRI) diffusion weighted imaging - fluid attenuated inversion recovery (DWI-FLAIR) mismatch concept is one p...

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The shoot apical meristem (SAM) is the ultimate source of all plant shoot cells. Continuous cell production in the meristem displaces cells towards the meristem periphery, where they organize into organ primordia. As cells exit the central zone, which contains the stem cells of the shoot, and move through the flanks to the primordia, their identity and behaviour changes: Cells in the centre hav...

SUMMARY The Hg-SYV46 parasitism gene is expressed exclusively in the dorsal oesophageal gland cell of parasitic stages of the soybean cyst nematode, Heterodera glycines, and it encodes a secretory protein that contains a C-terminal motif of the CLAVATA3/ESR-related (CLE) family in Arabidopsis thaliana. In shoot and floral meristems of Arabidopsis, the stem cells secret CLV3, a founding member o...

US surface O3 responds to varying global-toregional precursor emissions, climate, and extreme weather, with implications for designing effective air quality control policies. We examine these conjoined processes with observations and global chemistry-climate model (GFDLAM3) hindcasts over 1980–2014. The model captures the salient features of observed trends in daily maximum 8 h average O3: (1) ...

Latar belakang: Keputihan (Fluor Albus) pada wanita usia subur masih menjadi salah satu masalah terkait kesehatan reproduksi, yang berlebihan dapat gejala penyakit menular seksual. Kurangnya pengetahuan, sikap dan perilaku vaginal hygiene mempengaruhi kejadian keputihan Wanita (WUS). Banyak menganggap sebagai hal biasa sehingga tidak ditangani dengan baik, padahal menimbulkan risiko terjadinya ...

Transacting factors often form homo- and heterodimers and regulate various targets, the type of regulation depending on the dimeric combination. The WUS and TALE subfamilies are two atypical homeodomains in plants. A homeodomain mediates sequence-specific binding to its target DNA and usually consists of 60 amino acid residues, whereas atypical homeodomains have extra amino acid residues in the...

BACKGROUND Receptor kinases are a large gene family in plants and have more than 600 members in Arabidopsis. Receptor kinases in plants regulate a broad range of developmental processes, including steroid hormone perception, organ elongation, self-incompatibility, and abscission. Intracellular signaling components for receptor kinases in plants are largely unknown. The CLAVATA 1 (CLV1) receptor...