Rice small protein OsS1Fa1 participates in stress responses as an inner nuclear membrane protein.

The rice small protein OsS1Fa1, a homolog of spinach S1Fa, plays a significant role in drought tolerance, attributed to its transmembrane domain. In this study, we aim to further elucidate the potential roles of OsS1Fa1 in cold and biotic stresses as an inner nuclear membrane protein. Fluorescence analysis confirmed the localization of OsS1Fa1 to the inner nuclear membrane.

Arabidopsis COP1 guides stomatal response in guard cells through pH regulation.

Plants rely on precise regulation of their stomatal pores to effectively carry out photosynthesis while managing water status. The Arabidopsis CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1), a critical light signaling repressor, is known to repress stomatal opening, but the exact cellular mechanisms remain unknown. Here, we show that COP1 regulates stomatal movement by controlling the pH levels in guard cells.

Arabidopsis retromer subunit AtVPS29 is involved in SLY1-mediated gibberellin signaling.

Retromer protein AtVPS29 upregulates the SLY1 protein and downregulates the RGA protein, positively stimulating the development of the root meristematic zone, which indicates an important role of AtVPS29 in gibberellin signaling. In plants, the large retromer complex is known to play roles in multiple development processes, including cell polarity, programmed cell death, and root hair growth in Arabidopsis. However, many of its roles in plant development remain unknown.

mutation causes low leaf temperature under various abiotic stresses in .

Stomata are microscopic pores on epidermal cells of leaves and stems that regulate water loss and gas exchange between the plant and its environment. Constitutive photomorphogenic 1 (COP1) is an E3 ubiquitin ligase that is involved in plant growth and development and multiple abiotic stress responses by regulating the stability of various target proteins. However, little is known about how COP1 controls stomatal aperture and leaf temperature under various environmental conditions.

COP1 controls salt stress tolerance by modulating sucrose content.

The E3 ubiquitin ligase Constitutive Photomorphogenic 1 (COP1) plays evolutionarily conserved and divergent roles. In plants, COP1 regulates a large number of developmental processes including photomorphogenesis, seedling emergence, and gravitropism. Nevertheless, its function in abiotic stress tolerance remains largely unknown.