Plastid-localized ZmENR1/ZmHAD1 complex ensures maize pollen and anther development through regulating lipid and ROS metabolism.

Lipid metabolism is critical for male reproduction in plants. Many lipid-metabolic genic male-sterility (GMS) genes function in the anther tapetal endoplasmic reticulum, while little is known about GMS genes involved in de novo fatty acid biosynthesis in the anther tapetal plastid. In this study, we identify a maize male-sterile mutant, enr1, with early tapetal degradation, defective anther cuticle, and pollen exine.

Topological transformation of microbial proteins into iron single-atom sites for selective hydrogen peroxide electrosynthesis.

The emergence of single-atom catalysts offers exciting prospects for the green production of hydrogen peroxide; however, their optimal local structure and the underlying structure-activity relationships remain unclear. Here we show trace Fe, up to 278 mg/kg and derived from microbial protein, serve as precursors to synthesize a variety of Fe single-atom catalysts containing FeNO (1 ≤ x ≤ 4) moieties through controlled pyrolysis. These moieties resemble the structural features of nonheme Fe-dependent enzymes while being effectively confined on a microbe-derived, electrically conductive carbon support, enabling high-current density electrolysis.

Differential effects of fine particulate matter constituents on acute coronary syndrome onset.

Fine particulate matter has been linked with acute coronary syndrome. Nevertheless, the key constituents remain unclear. Here, we conduct a nationwide case-crossover study in China during 2015-2021 to quantify the associations between fine particulate matter constituents (organic matter, black carbon, nitrate, sulfate, and ammonium) and acute coronary syndrome, and to identify the critical contributors.

The chain mediating role of rumination and psychological resilience in symptom burden and kinesiophobia in patients with chronic heart failure.

Objective: To explore the chain-mediating role and impact of rumination and psychological resilience on symptom burden and kinesiophobia in patients with chronic heart failure.

Methods: We selected a total of 318 patients with chronic heart failure from a hospital in Wuxi between November 2023 and May 2024 using a convenience sampling method. Various scales and questionnaires assessed general information, symptom burden, resilience, rumination thinking, and kinesiophobia.