Alfalfa Photosynthesis Under Partial Root-Zone Drying: Diurnal Patterns and Its Non-Stomatal Limitations DOI Creative Commons

Yadong Wang,

Q L Zhang,

Mingxiu Ju

и другие.

Plants, Год журнала: 2025, Номер 14(11), С. 1573 - 1573

Опубликована: Май 22, 2025

The effects of stomatal factors plant leaves under partial root-zone drying (PRD) have been widely studied. However, the non-stomatal and relationship between photosynthesis with soil moisture not explored. In this study, four treatments over-irrigation, full irrigation, moderate water deficit, severe deficit were investigated, aiming to evaluate on diurnal variation alfalfa leaf PRD its limitations, as well moisture. results showed that any levels led a decrease in photosynthetic rate (Pn) leaves. Leaves displayed pronounced midday “photosynthetic lunch break,” while those over- irrigation did display phenomenon. Before 11:30 a.m., reduction Pn was primarily due evidenced by reduced conductance (Gs) decreased intercellular CO2 concentration (Ci). After limitations became dominant factor, both Gs transpiration (Tr) continuing decrease, Ci increased, indicating shift limiting factors. Under experienced within single day, leading hay yield 18.6%. Additionally, over-irrigation helped maintain higher Tr, increasing thus improving productivity 33.1%. correlation coefficients content at 10 cm depths Pn, measurement day 0.9864, 0.8571, 0.8462, respectively. At 20 cm, 0.8820, 0.6943, 0.6951, study concluded mechanisms contributed PRD. Furthermore, shallow also played crucial role influencing performance.

Язык: Английский

A Comprehensive Analysis of the Alternative Splicing Co-Factor U2AF65B Gene Family Reveals Its Role in Stress Responses and Root Development DOI Open Access
Xiangfeng Meng, Yongzhou Wang, Bei Tang

и другие.

International Journal of Molecular Sciences, Год журнала: 2025, Номер 26(8), С. 3901 - 3901

Опубликована: Апрель 20, 2025

U2AF65, a 65 kDa splicing co-factor, promotes spliceosome assembly. Although its role in alternative (AS) is known, the function of U2AF65B (the large subunit U2AF65) remains unclear. Therefore, we systematically identified and analyzed gene family across 36 plant species, revealing 103 putative members with conserved structures functions. Phylogenetic analysis divided genes into two clades five subgroups, indicating evolutionary divergence. Gene structure motif analyses showed that most have complex shared similar motifs. Homology modeling amino acid conservation revealed significant sequences, particularly Groups D E. Cis-acting element indicated respond to various stimuli, supported by expression under different stress conditions. Subcellular localization predictions proteins primarily localize nucleus cytoplasm. Alternative profile AS frequency likely varies between species. Functional AtU2AF65B mutant Arabidopsis loss enhances root elongation attenuates ABA-dependent germination suppression, negatively regulated seedling growth development. These findings provide insights history, molecular mechanisms, functional roles plants.

Язык: Английский

Процитировано

0
Alfalfa Photosynthesis Under Partial Root-Zone Drying: Diurnal Patterns and Its Non-Stomatal Limitations DOI Creative Commons

Yadong Wang,

Q L Zhang,

Mingxiu Ju

и другие.

Plants, Год журнала: 2025, Номер 14(11), С. 1573 - 1573

Опубликована: Май 22, 2025

The effects of stomatal factors plant leaves under partial root-zone drying (PRD) have been widely studied. However, the non-stomatal and relationship between photosynthesis with soil moisture not explored. In this study, four treatments over-irrigation, full irrigation, moderate water deficit, severe deficit were investigated, aiming to evaluate on diurnal variation alfalfa leaf PRD its limitations, as well moisture. results showed that any levels led a decrease in photosynthetic rate (Pn) leaves. Leaves displayed pronounced midday “photosynthetic lunch break,” while those over- irrigation did display phenomenon. Before 11:30 a.m., reduction Pn was primarily due evidenced by reduced conductance (Gs) decreased intercellular CO2 concentration (Ci). After limitations became dominant factor, both Gs transpiration (Tr) continuing decrease, Ci increased, indicating shift limiting factors. Under experienced within single day, leading hay yield 18.6%. Additionally, over-irrigation helped maintain higher Tr, increasing thus improving productivity 33.1%. correlation coefficients content at 10 cm depths Pn, measurement day 0.9864, 0.8571, 0.8462, respectively. At 20 cm, 0.8820, 0.6943, 0.6951, study concluded mechanisms contributed PRD. Furthermore, shallow also played crucial role influencing performance.

Язык: Английский

Процитировано

0