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   https://doi.org/10.1111/pbi.70628  

   Wang, Na; Feng, Yan; Cao, Jinting; Gao, Yiran; Pei, Yanxi; Wen, Jiangqi; Mysore, Kirankumar S; Lin, Hao; Niu, Lifang (March 2026, Plant Biotechnology Journal)
2. Intragenomic 18S Sequence Variability in the Termite Symbionts Kofoidia loriculata and Kofoidia repleta n. sp. (Parabasalia)

   https://doi.org/10.1111/jeu.70039  

   Mirza, Ezhan; Jasso‐Selles, Daniel E; Mizumoto, Nobuaki; Gile, Gillian H (September 2025, Journal of Eukaryotic Microbiology)

   ABSTRACT Kofoidia loriculatais an obligate symbiont of the desert dampwood termiteParaneotermes simplicicornis(Kalotermitidae). Its 18S rRNA genes were reported to show high sequence variability, but whether the variability was intragenomic, intraspecific, or even interspecific remained unclear. Here, we have cloned and sequenced PCR‐amplified 18S genes from individually isolatedKofoidiacells. Our phylogenetic analyses indicate that two species ofKofoidiainhabitP. simplicicornisin Arizona. Both species show intragenomic 18S sequence variability, with as little as 96.4% sequence identity between clones from a single cell, while the mean interspecific pairwise identity was 92.4%. Using RT‐PCR on DNase‐treated cells, we also observed sequence variability among the expressed 18S rRNAs. 

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3. SAXS structure of homodimeric oxyHemoglobin III from bivalve Lucina pectinata

   https://doi.org/10.1002/bip.23427  

   Marchany‐Rivera, Darya; Estremera‐Andújar, Rafael A; Nieves‐Marrero, Carlos; Ruiz‐Martínez, Carlos R; Bauer, William; López‐Garriga, Juan (June 2021, Biopolymers)

   Abstract Hemoglobin III (HbIII) is one of the two oxygen reactive hemoproteins present in the bivalve,Lucina pectinata. The clam inhabits a sulfur‐rich environment and HbIII is the only hemoprotein present in the system which does not yet have a structure described elsewhere. It is known that HbIII exists as a heterodimer with hemoglobin II (HbII) to generate the stable Oxy(HbII‐HbIII) complex but it remains unknown if HbIII can form a homodimeric species. Here, a new chromatographic methodology to separate OxyHbIII from the HbII‐HbIII dimer has been developed, employing a fast performance liquid chromatography and ionic exchange chromatography column. The nature of OxyHbIII in solution at concentrations from 1.6 mg/mL to 20.4 mg/mL was studied using small angle X‐ray scattering (SAXS). The results show that at all concentrations, the Oxy(HbIII‐HbIII) dimer dominates in solution. However, as the concentration increases to nonphysiological values, 20.4 mg/mL, HbIII forms a 30% tetrameric fraction. Thus, there is a direct relationship between the Oxy(HbIII‐HbIII) oligomeric form and hemoglobin concentration. We suggest it is likely that the OxyHbIII dimer contributes to active oxygen transport in tissues ofL pectinata, where the Oxy(HbII‐HbIII) complex is not present. 

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4. Structural stability and the low‐lying singlet and triplet states of BN ‐ n ‐acenes, n  = 1–7

   https://doi.org/10.1002/jcc.27038  

   Milanez, Bruno D.; dos Santos, Gustavo M.; Pinheiro, Max; Ueno, Leonardo T.; Ferrão, Luiz F.; Aquino, Adelia J.; Lischka, Hans; Machado, Francisco B. (March 2023, Journal of Computational Chemistry)
5. Facilitative Effects of Alnus viridisssp.fruticosa on Betula nanassp.exilis Growth in Arctic Alaska

   https://doi.org/10.1002/ece3.73535  

   Drew, Jackson W; Bret‐Harte, Marion Syndonia; Buchwal, Agata; Ruess, Roger (June 2026, Ecology and Evolution)

   ABSTRACT Arctic deciduous shrubs have responded to warming by increasing cover and extent, but how plant interactions (i.e., facilitation and competition) among deciduous shrub species might influence their climate sensitivities and overall growth remains unclear. Here, we investigate two deciduous shrubs:Betula nanassp.exilis(dwarf birch) andAlnus viridisssp.fruticosa(Siberian alder), the Arctic's only tall N‐fixing shrub, to determine how Siberian alder affects the growth of nearby dwarf birch. We harvested dwarf birch shrubs growing ‘near’ (i.e., within 1 m) and ‘away’ (≥ 3 m) from Siberian alders growing along the Sagwon Bluffs in Arctic Alaska for dendrochronological analysis. Dwarf birch traits and other site characteristics, including height, leaf N, catkin production, frost damage, and snow depth, were measured at additional sites nearby. We discovered locations ‘near’ Siberian alder had greater snow depth, which delayed the growing season for nearby dwarf birch, but likely protected them from early‐season frost damage. We estimated that radial growth occurring within 1979–2016 was delayed by 9 days, and peak radial growth was delayed by 2 weeks, for dwarf birch growing ‘near’ as compared to ‘away’ from alder. This resulted in different climate sensitivities for dwarf birch between locations. Measures of dwarf birch height, catkin abundance, leaf N, and average growth ring area were greater for plants ‘near’ alder than those ‘away’ from alder. This suggests that Siberian alder increased N mineralization and soil N availability under the deeper snowpack. Siberian alder facilitated dwarf birch growth. Through plant–plant interactions, Siberian alder altered the strength and type of stressors dwarf birch experienced, resulting in a change to the seasonality of its radial growth. Therefore, high‐spatial resolution species composition data could be included in vegetation models to predict future tundra growth responses more accurately to a changing climate. 

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