Plant Biology最新文献_第10页

Development of a novel multivariate germination index to quantify seed hydration memory. 建立一种新的多变量发芽指数来量化种子水化记忆。

IF 4.2 3区生物学

Plant Biology Pub Date : 2025-02-03 DOI: 10.1111/plb.13766

A T Lima, T S Almeida, D G de Santana, M V Meiado

{"title":"Development of a novel multivariate germination index to quantify seed hydration memory.","authors":"A T Lima, T S Almeida, D G de Santana, M V Meiado","doi":"10.1111/plb.13766","DOIUrl":"https://doi.org/10.1111/plb.13766","url":null,"abstract":"In recent decades, the concept of memory has gained significant attention in plant ecophysiology research. When memory is expressed during germination, it is referred to as 'seed hydration memory'. Although numerous metrics relate to different aspects of germination, the literature lacks a method for quantifying seed hydration memory. This study aimed to develop a Germination Memory Index (GMI); a mathematical tool designed to quantify seed memory. The GMI enables comparisons of different native or cultivated species germinating under various conditions following discontinuous hydration. We tested the GMI using data from an experiment that evaluated germination of Cereus jamacaru seeds subjected to water deficit after undergoing hydration and dehydration cycles (HD cycles). The index is calculated as the arithmetic mean of gains, if any, in germination capacity, expressed as germinability, that is time to reach 50% germination, mean germination rate, uniformity of germination, synchrony and germination uncertainty, obtained from discontinuous hydration of the seeds. The memory ranges from 0 ≤ GMI ≤1. Gains are observed when HD cycles enhance germination capacity, germination rate and synchrony while reducing time to reach 50% germination, uniformity and uncertainty compared to their reference values. The absence of memory occurs when GMI ≤0, indicating that the germination process is favourable without undergoing HD cycles. When germination only occurs after discontinuous hydration, GMI = 1. Using the GMI, we can accurately measure gains in germinative behaviour provided by HD cycles, as this index reflects changes not only in germination capacity but also in germination time, speed, uniformity, synchrony and uncertainty.","PeriodicalId":220,"journal":{"name":"Plant Biology","volume":" ","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143078084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Female-biased nectar production is associated with the Darwin's inflorescence syndrome 雌性偏爱的花蜜产生与达尔文花序综合症有关。

IF 4.2 3区生物学

Plant Biology Pub Date : 2025-01-27 DOI: 10.1111/plb.13768

M. M. Strelin, S. S. Gavini, M. A. Aizen

引用次数: 0

Flower colour contrast, ‘spectral purity’ and a red herring 花的颜色对比，“光谱纯度”和红鲱鱼。

IF 4.2 3区生物学

Plant Biology Pub Date : 2025-01-27 DOI: 10.1111/plb.13767

C. J. van der Kooi, J. Spaethe

{"title":"Flower colour contrast, ‘spectral purity’ and a red herring","authors":"C. J. van der Kooi, J. Spaethe","doi":"10.1111/plb.13767","DOIUrl":"10.1111/plb.13767","url":null,"abstract":"Nature offers a bewildering diversity of flower colours. Understanding the ecology and evolution of this fantastic floral diversity requires knowledge about the visual systems of their natural observers, such as insect pollinators. The key question is how flower colour and pattern can be measured and represented to characterise the signals that are relevant to pollinators. A common way to interpret flower colours is using animal vision models that incorporate the spectral sensitivity of a focal observer (e.g. bees). These vision models provide a measure of colour contrast, which represents the perceived chromatic difference between two objects, such as a yellow flower against green leaves. Colour contrast is a behaviourally and physiologically validated proxy for relative conspicuousness of a stimulus. A growing number of studies attempt to interpret flower colouration through parameters that are grafted on to principles of human colour perception. A perpetuating measure to describe floral colours is via saturation, which is a metric in human perception describing a certain aspect of colourfulness and is, in pollination literature, often referred to as ‘spectral purity’. We caution against the concept, calculation and biological interpretation of ‘spectral purity’ and similar measures that rest on an anthropocentric view, because it does not represent the diversity and complexity of animal visual systems that are the natural observers of flowers. We here discuss the strengths and weaknesses of common ways to interpret flower colouration and provide concrete suggestions for future colourful research.","PeriodicalId":220,"journal":{"name":"Plant Biology","volume":"27 2","pages":"189-194"},"PeriodicalIF":4.2,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/plb.13767","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143051219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cockroach pollination ensures sexual reproduction in the non-photosynthetic plant Balanophora tobiracola 蟑螂授粉确保了非光合植物Balanophora tobiracola的有性繁殖。

IF 4.2 3区生物学

Plant Biology Pub Date : 2025-01-24 DOI: 10.1111/plb.13770

K. Suetsugu

引用次数: 0

Higher PEPC activity and vein density contribute to improve cotton leaf water use efficiency under water stress. 较高的PEPC活性和脉密度有助于提高水分胁迫下棉花叶片水分利用效率。

IF 4.2 3区生物学

Plant Biology Pub Date : 2025-01-23 DOI: 10.1111/plb.13765

Z Lei, J Han, X Yi, X Luo, W Zhang, D He, C Gong, Y Zhang

{"title":"Higher PEPC activity and vein density contribute to improve cotton leaf water use efficiency under water stress.","authors":"Z Lei, J Han, X Yi, X Luo, W Zhang, D He, C Gong, Y Zhang","doi":"10.1111/plb.13765","DOIUrl":"https://doi.org/10.1111/plb.13765","url":null,"abstract":"Plants with the C4 photosynthetic pathway can withstand water stress better than plants with C3 metabolism. However, it is unclear whether C4 photosynthesis can be preliminarily activated in droughted cotton leaves, and if this contributes to increase in water use efficiency (WUE). An upland cotton (Gossypium hirsutum L., Xinluzao45) was used to determine gas exchange, stomatal and vein anatomy, phosphoenolpyruvate carboxykinase (PEPC) and Rubisco enzyme activity, and carbon isotope composition (δ13C) under well-watered, mild or moderate water stress. Water stress triggered reduced photosynthesis, stomatal conductance, and Rubisco activity, but higher vein density (VD), PEPC activity, and WUE. The correlations between δ13C and each of VD and PEPC activity implied that these coordinately contributed to higher leaf WUE via a preliminary induction of C4 photosynthetic pathway. Preliminary C4 photosynthesis indicated by more PEPC enzyme and veins offers an effective way to improve leaf WUE and potentially aids in acclimation to adverse growing conditions.","PeriodicalId":220,"journal":{"name":"Plant Biology","volume":" ","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143021422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In situ diversification and adaptive introgression in Taiwanese Scutellaria 台湾黄芩的原位多样化与适应性渗进。

IF 4.2 3区生物学

Plant Biology Pub Date : 2025-01-22 DOI: 10.1111/plb.13769

P.-W. Sun, J.-T. Chang, M.-X. Luo, C.-T. Chao, F. K. Du, P.-C. Liao

引用次数: 0

The branched-chain amino acid-related isoleucic acid: recent research advances 支链氨基酸相关异亮酸的研究进展。

IF 4.2 3区生物学

Plant Biology Pub Date : 2025-01-22 DOI: 10.1111/plb.13771

D. W. Mekonnen, A. Ghirardo, W. Zhang, A. R. Schäffner

{"title":"The branched-chain amino acid-related isoleucic acid: recent research advances","authors":"D. W. Mekonnen, A. Ghirardo, W. Zhang, A. R. Schäffner","doi":"10.1111/plb.13771","DOIUrl":"10.1111/plb.13771","url":null,"abstract":"Isoleucic acid (ILA) was identified in human patients with maple syrup urine disease (MSUD) half a century ago. MSUD patients, who are defective in the catabolism of branched-chain amino acids (BCAAs), that is, isoleucine, leucine, and valine, have urine with a unique maple syrup odour related to the accumulation of BCAA breakdown products, largely 2-keto acid derivatives and their reduced 2-hydroxy acids including ILA. A decade ago, ILA was identified in Arabidopsis thaliana. Subsequent studies in other plant species indicated that ILA is a ubiquitously present compound. Since its identification in plants, several efforts have been made to understand the biological significance and metabolic pathway of ILA. ILA plays a positive role in plant signalling for defence responses against bacterial pathogens by increasing the abundance of salicylic acid aglycone through competitive inhibition of SA deactivation by glucosylation. Here, we review recent progress in the characterization of ILA biosynthesis and function in plants and discuss current knowledge gaps and future directions in ILA research.","PeriodicalId":220,"journal":{"name":"Plant Biology","volume":"27 2","pages":"195-202"},"PeriodicalIF":4.2,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/plb.13771","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143021495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influences of plant maternal effects, chemotype, and environment on the leaf bacterial community 植物母系效应、化学型和环境对叶片细菌群落的影响。

IF 4.2 3区生物学

Plant Biology Pub Date : 2025-01-17 DOI: 10.1111/plb.13759

A. Malacrinò, R. Jakobs, S. Xu, C. Müller

引用次数: 0

Pollen–pistil interaction in Mauritia flexuosa: structural and cytological aspects provide insight into the reproductive success of a dioecious palm with supra-annual flowering in a semiarid environment 毛柔花的花粉-雌蕊相互作用：结构和细胞学方面提供了在半干旱环境中具有超年开花的雌雄异株棕榈的生殖成功的见解。

IF 4.2 3区生物学

Plant Biology Pub Date : 2025-01-17 DOI: 10.1111/plb.13761

H. C. Mazzottini-dos-Santos, L. M. Ribeiro, P. P. Fonseca, I. F. P. Azevedo, C. S. Souza, Y. R. F. Nunes

引用次数: 0

Redistribution of soil water by mature trees towards dry surface soils and uptake by seedlings in a temperate forest. 温带森林中成熟树木对干燥表层土壤水分的再分配和幼苗对土壤水分的吸收。

IF 4.2 3区生物学

Plant Biology Pub Date : 2025-01-17 DOI: 10.1111/plb.13764

B D Hafner, B D Hesse, T E E Grams

{"title":"Redistribution of soil water by mature trees towards dry surface soils and uptake by seedlings in a temperate forest.","authors":"B D Hafner, B D Hesse, T E E Grams","doi":"10.1111/plb.13764","DOIUrl":"https://doi.org/10.1111/plb.13764","url":null,"abstract":"Hydraulic redistribution is considered a crucial dryland mechanism that may be important in temperate environments facing increased soil drying-wetting cycles. We investigated redistribution of soil water from deeper, moist to surface, dry soils in a mature mixed European beech forest and whether redistributed water was used by neighbouring native seedlings. In two experiments, we tracked hydraulic redistribution via (1) 2H labeling and (2) 18O natural abundance. In a throughfall exclusion experiment, 2H water was applied to 30-50 cm soil depth around mature beech trees and traced in soils, in coarse and fine roots, and in the rhizosphere. On five additional natural plots, the 18O signal was measured in seedlings of European beech, Douglas fir, silver fir, sycamore maple, and Norway spruce at dawn and noon after a rain-free period. We found a significant enrichment in 2H in surface soil fine roots of mature beech, and an indication for transfer of this water into their rhizosphere, suggesting hydraulic redistribution from deeper, moist to drier surface soils. On four of the five additional plots, δ18O of seedlings' root water was lower at dawn than at noon. This indicated that dawn root water originated from soil layers deeper than the seedlings' rooting depth, suggesting hydraulic redistribution by neighbouring mature trees. Hydraulic redistribution equated to about 10% of daily transpiration in mature beech trees, and contributed to root water in understory seedlings, emphasizing hydraulic redistribution as a notable mechanism in temperate forests. Transport mechanisms and potential of different tree species to redistribute water should be further addressed.","PeriodicalId":220,"journal":{"name":"Plant Biology","volume":" ","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142997088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0