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PubMed Journals Articles About "Leaf Group Ltd." RSS

04:18 EST 18th January 2019 | BioPortfolio

Leaf Group Ltd. PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Leaf Group Ltd. articles that have been published worldwide.

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We have published hundreds of Leaf Group Ltd. news stories on BioPortfolio along with dozens of Leaf Group Ltd. Clinical Trials and PubMed Articles about Leaf Group Ltd. for you to read. In addition to the medical data, news and clinical trials, BioPortfolio also has a large collection of Leaf Group Ltd. Companies in our database. You can also find out about relevant Leaf Group Ltd. Drugs and Medications on this site too.

Showing "Leaf Group" PubMed Articles 1–25 of 12,000+

Linking leaf hydraulic properties, photosynthetic rates, and leaf lifespan in xerophytic species: a test of global hypotheses.

Leaf venation and its hierarchal traits are crucial to the hydraulic and mechanical properties of leaves, reflecting plant life-history strategies. However, there is an extremely limited understanding of how variation in leaf hydraulics affects the leaf economic spectrum (LES) or whether venation correlates more strongly with hydraulic conductance or biomechanical support among hierarchal orders.


Do Steviol Glycosides Act Either as a Carbon Storage Pool or in Osmoregulation within Leaves of Stevia rebaudiana?

Steviol glycosides (SG) (with stevioside and rebaudioside A predominating) are present in wild-type Stevia rebaudiana, at approximately 10% of dry weight (dw), prompting a consideration of the autoecological role played by these compounds in terms of energy (C) storage and/or osmoregulation. The leaf starch pool was observed to change diurnally with respect to the light cycle (from 3.29% to 0.73% of leaf dw between dusk and dawn) and also to increase under constant light treatment (from 1.53% to 6.25% of le...

Development: Cell Polarity Is Coordinated over an Entire Plant Leaf.

Models of leaf development have long predicted the existence of an organ-wide polarity field. Now, a robust analysis in a developing Arabidopsis leaf reveals the presence of a general and persistent cell polarity coordinated over the entire leaf.


Clarifying the influence of temperature on variances in plant metallic nutrients through minimizing the effect of precipitation.

Understanding the responses of plant nutrients to climate warming is important in the research of global change. However, the responses of plant metallic nutrients to climate warming have been rarely addressed. Furthermore, in previous field investigations, the influence of temperature on plant metallic nutrients has been not effectively separated from that of precipitation; hence, there exists some uncertainties in the relationships between plant metallic nutrients and temperature. To minimize the effect o...

Modelling leaf spectral properties in a soybean functional-structural plant model by integrating the prospect radiative transfer model.

Currently, functional-structural plant models (FSPMs) mostly resort to static descriptions of leaf spectral characteristics, which disregard the influence of leaf physiological changes over time. In many crop species, including soybean, these time-dependent physiological changes are of particular importance as leaf chlorophyll content changes with leaf age and vegetative nitrogen is remobilized to the developing fruit during pod filling.

Leaf adaptations and species boundaries in North American Cercis: implications for the evolution of dry floras.

The North American Cercis clade spans dry to mesic climates and exhibits complex morphological variation. We tested various proposed species classifications of this group and whether aspects of leaf morphology, particularly the "drip-tip" in some regional populations, are adaptive and/or linked with phylogeny.

Elevated carbon dioxide plus chronic warming causes dramatic increases in leaf angle in tomato, which correlates with reduced plant growth.

Limited evidence indicates that moderate leaf hyponasty can be induced by high temperatures or un-naturally-high CO . Here we report that the combination of warming plus elevated CO (eCO ) induces severe leaf hyponasty in tomato (Solanum lycopersicum L.). To characterize this phenomenon, tomato plants were grown at two levels of CO (400 vs. 700 ppm) and two temperature regimes (30 vs. 37 C) for 16-18 days. Leaf hyponasty increased dramatically with warming plus eCO , but increased only slightly with either ...

Minimizing the effect of precipitation in clarifying the responses of leaf N and P stoichiometry to temperature.

How terrestrial ecosystem responds to global warming has received wide attention. Plant stoichiometry has the potential to reflect ecosystem responses to climate change, thus, investigating the variations in plant stoichiometry with temperature is important and necessary for revealing the responses of terrestrial ecosystem to global warming. Although many studies had explored the relationships between plant N, P stoichiometry and temperature, previous field investigations did not eliminate the interference ...

The value of wet leaves.

Contents I. II. III. IV. V. References SUMMARY: An often-overlooked feature of all plants is that their leaf surfaces are wet for significant periods over their lifetimes. Leaf wetting has a number of direct and indirect effects on plant function from the scale of the leaf to that of the ecosystem. The costs of leaf wetting for plant function, such as the growth of pathogens and the leaching of nutrients, have long been recognized. However, an emerging body of research has also begun to demonstrate some ver...

Complete nucleotide sequence of a novel monopartite begomovirus infecting Ageratum conyzoides in China.

Two isolates of a novel monopartite begomovirus were obtained from naturally infected Ageratum conyzoides plants showing typical leaf curling and enation symptoms in Sichuan Province, China. The complete DNA sequences of two isolates were determined to be 2749 nucleotides in length. Sequence analysis showed that the two isolates shared 99.5% identity, and the highest identity (89.5-89.6%) was with the DNA sequence of tomato leaf curl Hainan virus (ToLCHaiV). No other begomoviruses or satellite molecules wer...

Elevational variations of leaf stochiometry in Leontopodium leontopodioides on the Qinghai-Tibetan Plateau, China.

Topography has major impacts on the trade-off of plant survival strategies. Exploring the differential pattern of leaf ecological stoichiometry along the elevation gradient contributes to a better understanding of plant's response to environmental changes and its ecological adaptability. We investigated leaf C, N, and P concentrations and stoichiometric ratios of Leontopodium leontopodioides at three elevations, including from 4400 m to 4700 m, from 4701 m to 5000 m, and from 5001 m to 5300 m, on the northe...

Leaf morphology, rather than plant water status, underlies genetic variation of rice leaf rolling under drought.

Soil drying causes leaf rolling in rice, but the relationship between leaf rolling and drought tolerance has historically confounded selection of drought tolerant genotypes. In this study on tropical japonica and aus diversity panels (170-220 genotypes), the degree of leaf rolling under drought was more affected by leaf morphology than by stomatal conductance, leaf water status, or maintenance of shoot biomass and grain yield. A range of canopy temperature and leaf rolling (measured as change in normalized ...

Water relations determine short time leaf growth patterns in the mangrove Avicennia marina (Forssk.) Vierh.

High resolution leaf growth is rarely studied despite its importance as a metric for plant performance and resource use efficiency. This is in part due to methodological challenges. Here, we present a method for in situ leaf growth measurements in a natural environment. We measured instantaneous leaf growth on a mature Avicennia marina subsp. australasica tree over several weeks. We measured leaf expansion by taking time-lapse images, and analysing them using marker tracking software. A custom made instrume...

Rice miR394 suppresses leaf inclination through targeting an F-box gene, LEAF INCLINATION 4.

Rice leaf inclination is an important agronomic trait, closely related to plant architecture and yield. Identification of genes controlling leaf inclination would assist in crop improvement. Although various factors, including the plant hormones auxin and brassinosteroids, have been shown to regulate lamina joint development, the role of microRNAs in regulating leaf inclination remains largely unknown. Here, we functionally characterize the role of rice miR394 and its target, LEAF INCLINCATION 4 (LC4), whic...

MdbHLH93, an apple activator regulating leaf senescence, is regulated by ABA and MdBT2 in antagonistic ways.

The molecular mechanism of leaf senescence in apple (Malus domestica) is still not fully understood. We used gene expression analysis and protein-protein interactions to decipher the relationships of abscisic acid (ABA) and two proteins MdbHLH93 and MdBT2 in the senescence process. We found that MdbHLH93 promoted leaf senescence and the expression of senescence-related genes, which exhibited similar effects of ABA's on leaf senescence. MdbHLH93 directly activated the transcription of MdSAG18. We also found ...

Prospects for enhancing leaf photosynthetic capacity by manipulating mesophyll cells morphology.

Leaves are beautifully specialized organs designed to maximize the use of light and CO2 for photosynthesis. Engineering leaf anatomy therefore brings great potential to enhance photosynthetic capacity. Here we review the effect of the dominant leaf anatomical traits on leaf photosynthesis and confirm that a high chloroplast surface area exposed to intercellular airspace per unit leaf area (Sc) is critical for efficient photosynthesis. The possibility of improving Sc through appropriately increasing mesophyl...

Quercus ilex L. leaves as filters of air Cd, Cr, Cu, Ni and Pb.

The study of particulate matter pollution in urban areas is of great concern due its adverse effects on human health. Roadside vegetation, intercepting and filtering it, contributes to improve air quality. The aim of the research was to investigate the capability of Q. ilex leaves, already known good biomonitors of air quality, in filtering air metals. Besides, the main derivation (i.e. air or root uptake) of the investigated metals in leaf tissue was evaluated. The concentrations of Cd, Cr, Cu, Ni and Pb ...

ORESARA15, a PLATZ transcription factor, mediates leaf growth and senescence in Arabidopsis.

Plant leaves undergo a series of developmental changes from leaf primordium initiation through growth and maturation to senescence throughout their life span. Although the mechanisms underlying leaf senescence have been intensively elucidated, our knowledge of the interrelationship between early leaf development and senescence is still fragmentary. We isolated the oresara15-1Dominant (ore15-1D) mutant, which had an extended leaf longevity and an enlarged leaf size, from activation-tagged lines of Arabidopsi...

Molecular Mechanisms of Leaf Morphogenesis.

Plants maintain the ability to form lateral appendages throughout their life cycle and form leaves as the principal lateral appendages of the stem. Leaves initiate at the peripheral zone of the shoot apical meristem, then develop into flattened structures. In most plants, the leaf functions as a solar panel, where photosynthesis converts carbon dioxide and water into carbohydrates and oxygen. To produce structures that can optimally fulfil this function, plants precisely regulate the initiation, shape, and ...

Leaf economics spectrum in rice: Leaf anatomical, biochemical and physiological trait trade-offs.

The leaf economics spectrum (LES) is an eco-physiological concept describing the trade-offs of leaf structural, and physiological traits, that has been widely investigated across multiple scales. However, the effects of the breeding process on the LES in crops, as well as the mechanisms of the trait trade-offs underlying the LES, have not been thoroughly elucidated to date. In this study, a dataset, including leaf anatomical, biochemical and functional traits, was constructed to evaluate the trait covariati...

Essential oil from Korean Chamaecyparis obtusa leaf ameliorates respiratory activity in Sprague‑Dawley rats and exhibits protection from NF-κB-induced inflammation in WI38 fibroblast cells.

To date, Korean hinoki cypress (Chamaecyparis obtusa), has been widely used for household and commercial purposes. Although the medicinal efficacy of hinoki cypress essential oil has been observed, that of the essential oil‑derived terpenes, which exhibit a mechanism that acts against lung inflammation, remains to be fully elucidated. The present study investigated the anti‑inflammatory effect of hinoki cypress leaf extracted essential oil on lipopolysaccharide (LPS)‑stimulated WI38 fibroblast cells b...

SPOC domain-containing protein Leaf inclination3 interacts with LIP1 to regulate rice leaf inclination through auxin signaling.

Leaf angle is an important agronomic trait and influences crop architecture and yield. Studies have demonstrated the roles of phytohormones, particularly auxin and brassinosteroids, and various factors in controlling leaf inclination. However, the underlying mechanism especially the upstream regulatory networks still need being clarified. Here we report the functional characterization of rice leaf inclination3 (LC3), a SPOC domain-containing transcription suppressor, in regulating leaf inclination through i...

Trans-species predictors of tree leaf mass.

Tree leaf mass is a small, highly variable, but critical, component of forest ecosystems. Estimating leaf mass on standing trees with models is challenging because leaf mass varies both within and between tree species and at different locations and points in time. Typically, models for estimating tree leaf mass are species-specific, empirical models that predict intra-specific variation from stem diameter at breast height (DBH). Such models are highly limited in their application because there are many othe...

Effect of Hypericum humifusum aqueous and methanolic leaf extracts on biochemical and histological parameters in adult rats.

Hypericum genus is traditionally known for its medicinal use and its therapeutic and antioxidant effects. However, the toxic effect of this plant has not been much explored. Our study aimed at investigating the effect of Hypericum humifusum (Hh) leaf extracts on oxidative stress parameters in male rats. For it, we first focused on the phytochemical analysis of the aqueous and methanolic extracts of Hh leaves. Hence, Wistar rats were treated per gavage for 30 days and divided into Control (1 mL/rat, distil...

Leaf anatomical traits determine the O enrichment of leaf water in coastal halophytes.

Anatomical adaptations to high-salinity environments in mangrove leaves may be recorded in leaf water isotopes. Recent studies observed lower O enrichment (∆ ) of leaf water with respect to source water in three mangrove species relative to adjacent freshwater trees, but the factors that govern this phenomenon remain unclear. To resolve this issue, we investigated leaf traits and ∆ in 15 species of true mangrove plants, 14 species of adjacent freshwater trees and 4 species of semi-mangrove plants at fi...


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