journal
MENU ▼
Read by QxMD icon Read
search

Plant Biology

journal
https://www.readbyqxmd.com/read/28509436/pollinators-shift-to-nectar-robbers-when-florivory-occurs-with-effects-on-reproductive-success-in-iris-bulleyana-iridaceae
#1
Zhong-Ming Ye, Xiao-Fang Jin, Qing-Feng Wang, Chun-Feng Yang, David W Inouye
Studies have indicated that florivory and nectar robbing may reduce reproductive success of host plants. However, whether and how these effects might interact when plants are attacked by both florivores and nectar robbers simultaneously still need further investigation. We used Iris bulleyana to detect the interactions among florivory, nectar robbing, and pollination, and moreover, their effects on plant reproductive success. Field investigations and hand pollination treatments were conducted on two experimental plots from a natural population, in which Experimental plot was protected from florivores and Control plot was unmanipulated...
May 16, 2017: Plant Biology
https://www.readbyqxmd.com/read/28504871/pollination-and-breeding-system-of-the-enigmatic-south-african-parasitic-plant-mystropetalon-thomii-mystropetalaceae-rodents-welcome-but-not-needed
#2
Nina Hobbhahn, Sandy-Lynn Steenhuisen, Toni Olsen, Jeremy J Midgley, Steven D Johnson
Unrelated plants adapted to particular pollinator types tend to exhibit convergent evolution in floral traits. However, inferences about likely pollinators from "pollination syndromes" can be problematic due to trait overlap among some syndromes and unusual floral architecture in some lineages. An example is the rare South African parasitic plant Mystropetalon thomii (Mystropetalaceae), which has highly unusual brush-like inflorescences that exhibit features of both bird- and rodent-pollination syndromes. We used camera traps to record flower visitors, quantified floral spectral reflectance and nectar and scent production, experimentally determined self-compatibility and breeding system, and studied pollen dispersal using fluorescent dyes...
May 15, 2017: Plant Biology
https://www.readbyqxmd.com/read/28493285/hidden-floral-adaptation-to-nocturnal-moths-in-an-apparently-bee-pollinated-flower-adenophora-triphylla-var-japonica-campanulaceae
#3
Daichi Funamoto, Kazuharu Ohashi
• The discrepancy between observed flower visitors and those predicted based on floral phenotype has often cast doubt on the pollination syndrome concept. Here we show that this paradox may be alleviated by gaining a better knowledge of the contributions of different flower visitors to pollination and the effects of floral traits that cannot be readily perceived by humans in Adenophora triphylla var. japonica. The blue, bell-shaped and pendent flowers of A. triphylla appear to fit a bee pollination syndrome...
May 10, 2017: Plant Biology
https://www.readbyqxmd.com/read/28480629/drivers-of-tree-fecundity-in-pedunculate-oak-quercus-robur-refugial-populations-at-the-species-southwestern-range-margin
#4
Eva Moracho, Pedro Jordano, Arndt Hampe
RATIONALE: The current low-latitudinal range margins of many extra-tropical plant species consist of small and scattered populations that persist locally in microrefugia. It remains poorly understood how their refugial distribution affects mating patterns and reproductive success. Here we examine flower and acorn production and their determinants in refugial populations of the widespread European forest tree Pedunculate oak (Quercus robur). METHODS: We monitored male flower, female flower and acorn production in 159 adult trees from 12 oak stands over two years...
May 8, 2017: Plant Biology
https://www.readbyqxmd.com/read/28453883/stomatal-function-density-and-pattern-and-co2-assimilation-in-arabidopsis-thaliana-tmm1-and-sdd1-1-mutants
#5
Martina Vráblová, Daniel Vrábl, Marie Hronková, Jiří Kubásek, Jiří Šantrůček
Stomata modulate the exchange of water and CO2 between plant and atmosphere. Although stomatal density is known to affect CO2 diffusion into the leaf and thus photosynthetic rate, the effect of stomatal density and patterning on CO2 assimilation is not fully understood. We used wild-types Col-0 and C24 and stomatal mutants sdd1-1 and tmm1 of Arabidopsis thaliana, differing in stomatal density and pattern, to study the effects of these variations on both stomatal and mesophyll conductance and CO2 assimilation rate...
April 28, 2017: Plant Biology
https://www.readbyqxmd.com/read/28449392/osmotic-stress-decreases-complexity-underlying-the-electrophysiological-dynamic-in-soybean
#6
G F R Saraiva, A S Ferreira, G M Souza
Research rationale: Studies on plant electrophysiology are mostly focused on specific traits of single cells. Inspired by the complexity of the signaling network in plants and by analogies with neurons in human brains, we have sought for evidences of high complexity in the electrical dynamics of plant signaling and a likely relation with environmental cues. Central methods: An EEG-like standard protocol was adopted for high-resolution measurements of the electrical signal in Glycine max seedlings. The signals were continuously recorded in the same plants before and after the osmotic stimuli with a -2 MPa mannitol solution...
April 27, 2017: Plant Biology
https://www.readbyqxmd.com/read/28430395/flower-colour-polymorphism%C3%A2-in-the-mediterranean-basin-occurrence-maintenance-and-implications-for-speciation
#7
REVIEW
E Narbona, H Wang, P L Ortiz, M Arista, E Imbert
Flower colour polymorphism (FCP) is the occurrence of at least two discrete flower colour variants in the same population. Despite a vast body of research concerning the maintenance and evolutionary consequences of FCP, only recently has the spatial variation in morph frequencies among populations been explored. Here we summarise the biochemical and genetic basis of FCP, the factors that have been proposed to explain their maintenance, and the importance of FCP and its geographic variation in the speciation process...
April 21, 2017: Plant Biology
https://www.readbyqxmd.com/read/28419758/provenance-effect-on-carbon-assimilation-photochemistry-and-leaf-morphology-in-mediterranean-cistus-species-under-chilling-stress
#8
G Puglielli, F J Cuevas Román, R Catoni, J M Moreno Rojas, L Gratani, L Varone
The potential resilience of shrub species to environmental change deserves attention in those areas threatened by climate change, such as the Mediterranean Basin. We asked if leaves produced under different climate conditions through the winter season to spring can highlight the leaf traits involved in determining potential resilience of three Cistus spp. to changing environmental conditions and to what extent intraspecific differences affect such a response. We analysed carbon assimilation, maximum quantum efficiency of PSII photochemistry (Fv /Fm ) and leaf morphological control of the photosynthetic process in leaves formed through the winter season into spring in C...
April 18, 2017: Plant Biology
https://www.readbyqxmd.com/read/28403565/inhibitory-effect-of-thymus-vulgaris-and-origanum-vulgare-essential-oils-on-virulence-factors-of-phytopatogenic-pseudomonas-syringae-strains
#9
M E Carezzano, J P Sotelo, E Primo, E B Reinoso, M F Paletti Rovey, M S Demo, W F Giordano, M de Las M Oliva
Pseudomonas syringae is a phytopathogenic bacterium that causes lesions in the leaves during the colonization process. The damage is associated to the production of many virulence factors such as biofilm and phytotoxins. The essential oils of Thymus vulgaris and Origanum vulgare have demonstrated the ability to inhibit P. syringae. The aim of this study was to investigate the effects of T. vulgaris and O. vulgare essential oils on the production of virulence factors of phytopatogenic P. syringae strains, including anti-biofilm and anti-toxins activities...
April 12, 2017: Plant Biology
https://www.readbyqxmd.com/read/28403551/cyclic-electron-flow-npq-and-photorespiration-are-crucial-for-the-establishment-of-young-plants-of-ricinus-communis-and-jatropha-curcas-exposed-to-drought
#10
M C Lima Neto, J V A Cerqueira, J R da Cunha, R V Ribeiro, J A G Silveira
Although plant physiological responses to drought have been widely studied, the interaction between photoprotection, photorespiration and antioxidant metabolism in water-stressed plants is scarcely addressed. This study aimed to evaluate the physiological adjustments preserving photosynthesis and growth in two plant species with different tolerance to drought: Jatropha curcas and Ricinus communis. We measured stress indicators, gas exchange, photochemistry of PSII and PSI, antioxidant enzymes, cyclic electron flow and photorespiration...
April 12, 2017: Plant Biology
https://www.readbyqxmd.com/read/28402054/no-evidence-of%C3%A2-contemporary-interploidy-gene-flow-between-the-closely-related-european-woodland-violets-viola-reichenbachiana-and-v-riviniana-sect-viola-violaceae
#11
Grzegorz Migdałek, Justyna Nowak, Marta Saługa, Elżbieta Cieślak, Magdalena Szczepaniak, Michał Ronikier, Thomas Marcussen, Aneta Słomka, Elżbieta Kuta
Viola reichenbachiana (2n = 4x = 20) and V. riviniana (2n = 8x = 40) are closely related species widely distributed in Europe, often sharing the same habitat throughout their overlapping ranges. It has been suggested in numerous studies that their high intraspecific morphological variability and plasticity might have been further increased by interspecific hybridization in contact zones, given the sympatry of the species and the incomplete sterility of their hybrid. The aims of this study were to (i) confirm that V...
April 12, 2017: Plant Biology
https://www.readbyqxmd.com/read/28387987/molecular-markers-provide-evidence-for-a-broad-fronted-recolonisation-of-the-widespread-calcareous-grassland-species-sanguisorba-minor-from-southern-and-cryptic-northern-refugia
#12
S Tausch, M Leipold, P Poschlod, C Reisch
Calcareous grasslands belong to the most species-rich and endangered habitats in Europe. However, little is known about the origin of the species typically occurring in these grasslands. In this study we analysed the glacial and post-glacial history of Sanguisorba minor, a typical plant species frequently occurring in calcareous grasslands. The study comprised 38 populations throughout the whole distribution range of the species across Europe. We used molecular markers (AFLP) and applied Bayesian cluster analysis as well as spatial principal components analysis (sPCA) to identify glacial refugia and post-glacial migration routes to Central Europe...
April 7, 2017: Plant Biology
https://www.readbyqxmd.com/read/28376255/do-understory-or-overstory-traits-drive-tree-encroachment-on-a-drained-raised-bog
#13
Andrzej M Jagodziński, Paweł Horodecki, Katarzyna Rawlik, Marcin K Dyderski
One of the most important threats to peatland ecosystems is drainage, resulting in encroachment of woody species. The main aim of this study was to check which features -NDASH- overstory or understory vegetation -NDASH- are more important for shaping the seedling bank of pioneer trees colonizing peatlands (Pinus sylvestris and Betula pubescens). We hypothesized that tree stand parameters will be more important predictors of natural regeneration density than understory vegetation parameters, and the former will be negatively correlated with species diversity and richness and also with functional richness and functional dispersion, which indicate a high level of habitat filtering...
April 4, 2017: Plant Biology
https://www.readbyqxmd.com/read/28322489/long-distance-movement-of-phosphate-starvation-responsive-micrornas-in-arabidopsis
#14
A K Huen, C Rodriguez-Medina, A Y Y Ho, C A Atkins, P M C Smith
Plant microRNAs are small RNAs that are important for genetic regulation of processes such as plant development or environmental responses. Specific microRNAs accumulate in the phloem during phosphate starvation, and may act as long-distance signalling molecules. We performed quantitative PCR on Arabidopsis hypocotyl micrograft tissues of wild-type and hen1-6 mutants to assess the mobility of several phosphate starvation-responsive microRNA species. In addition to the previously confirmed mobile species miR399d, the corresponding microRNA* (miR399d*) was identified for the first time as mobile between shoots and roots...
March 21, 2017: Plant Biology
https://www.readbyqxmd.com/read/28316136/is-floral-morphology-a-good-predictor-of-floral-visitors-to-antirrhineae-snapdragons-and-relatives
#15
Beatriz Guzmán, José María Gómez, Pablo Vargas
The association between plants and flower visitors has been historically proposed as a main factor driving the evolutionary change of both flower and pollinator phenotypes. The considerable diversity in floral morphology within the tribe Antirrhineae has been traditionally related to pollinator types. We used empirical data on the flower visitors from 59 Antirrhineae taxa from the literature and our own field surveys, which provide an opportunity to test whether flower phenotypes are reliable predictors of visitors and pollinator niches (i...
March 17, 2017: Plant Biology
https://www.readbyqxmd.com/read/28303638/a-review-of-the-methods-for-storing-floral-nectars-in-the-field
#16
REVIEW
B Amato, S Petit
The knowledge of floral nectar sugar characteristics such as concentration, ratio, and mass is essential to understand the complex nature of nectar production and pollination systems. Although nectar is commonly stored in ecology, storage reliability and effectiveness have rarely been quantified. Inappropriate nectar storage between sampling and analysis can alter nectar chemistry as a result of enzyme or microbial action. Our review of the literature indicates that measures to preserve nectar sugars before analysis include refrigeration, freezing, the addition of an antimicrobial agent, spotting and drying on filter paper, the addition of a desiccant, or a combination of these storage treatments...
March 17, 2017: Plant Biology
https://www.readbyqxmd.com/read/28303636/variation-in-seed-packaging-of-a-fleshy-fruited-conifer-provides-insights-into-the-ecology-and-evolution-of-multi-seeded-fruits
#17
L DeSoto, R Torices, S Rodríguez-Echeverría, C Nabais
The study of intraspecific seed packaging (i.e. seed size/number strategy) variation across different populations may allow better understanding of the ecological forces that drive seed evolution in plants. Juniperus thurifera (Cupressaceae) provides a good model to study this due to the existence of two subspecies differentiated by phenotypic traits, such as seed size and cone seediness (number of seeds inside a cone), across its range. The aim of this study was to analyse seed packaging (seed mass and cone seediness) variation at different scales (subspecies, populations and individuals) and the relationship between cone and seed traits in European and African J...
March 17, 2017: Plant Biology
https://www.readbyqxmd.com/read/28295874/is-the-diversification-of-mediterranean-basin-plant-lineages-coupled-to-karyotypic-changes
#18
M Escudero, F Balao, S Martín-Bravo, L Valente, V Valcárcel
The Mediterranean Basin region, home to 25,000 plant species, is included in the worldwide list of hotspots of biodiversity. Despite the indisputably important role of chromosome transitions in plant evolution and diversification, no reference study to date has dealt with the possible relationship between chromosome evolution and lineage diversification in the Mediterranean Basin. Here we study patterns of diversification, patterns of chromosome number transition (either polyploidy or dysploidy) and the relationship between the two for 14 Mediterranean Basin angiosperm lineages using previously published phylogenies...
March 13, 2017: Plant Biology
https://www.readbyqxmd.com/read/28294500/geographical-variation-and-the-role-of-climate-in-leaf-traits-of-a-relict-tree-species-across-its-distribution-in-china
#19
H Meng, X Wei, S B Franklin, H Wu, M Jiang
Intraspecific trait variation and trait-climate relationships are crucial for understanding a species' response to climate change. However, these phenomena have rarely been studied for tree species. Euptelea pleiospermum is a relict tree species with a wide distribution in China that offers a novel opportunity to examine such relationships. Here, we measured 13 leaf traits of E. pleiospermum in 20 sites across its natural distribution in China. We investigated the extent of trait variation at local and regional scales, and developed geographic and climate models to explain trait variation at the regional scale...
March 13, 2017: Plant Biology
https://www.readbyqxmd.com/read/28267260/comparative-transcriptomic-analysis-of-key-genes-involved-in-flavonoid-biosynthetic-pathway-and-identification-of-a-flavonol-synthase-from-artemisia-annua-l
#20
Shuoqian Liu, Liping Liu, Yuwei Tang, Shuo Xiong, Jinhua Long, Zhonghua Liu, Na Tian
(1) The regulation mechanism of flavonoids, which were found to synergize anti-malarial and anti-cancer compounds in Artemisia annua, is still unclear. (2) In this study, an anthocyanidin-accumulating mutant callus was induced from A. annua, and then comparative transcriptomic analysis of the wild-type and mutant calli was performed, based on the next-generation Illumina/Solexa sequencing platform and de novo assembly. (3) As a result, a total of 82,393 unigenes were obtained and 34,764 unigenes were annotated in the public database...
March 7, 2017: Plant Biology
journal
journal
40211
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"