Read by QxMD icon Read

Adaptive shooting

Ellen Young, Manus Carey, Andrew A Meharg, Caroline Meharg
BACKGROUND: Plants can adapt to edaphic stress, such as nutrient deficiency, toxicity and biotic challenges, by controlled transcriptomic responses, including microbiome interactions. Traditionally studied in model plant species with controlled microbiota inoculation treatments, molecular plant-microbiome interactions can be functionally investigated via RNA-Seq. Complex, natural plant-microbiome studies are limited, typically focusing on microbial rRNA and omitting functional microbiome investigations, presenting a fundamental knowledge gap...
March 20, 2018: Microbiome
Baoli Fan, Allen David McHugh, Shujiang Guo, Quanlin Ma, Jianhui Zhang, Xiaojuan Zhang, Weixing Zhang, Juan Du, Qiushi Yu, Changming Zhao
Calligonum mongolicum is a successful pioneer shrub to combat desertification, which is widely used for vegetation restoration in the desert regions of northwest China. In order to reveal the limitations to natural regeneration of C. mongolicum by asexual and sexual reproduction, following the process of sand dune stabilization, we assessed clonal shoots, seedling emergence, soil seed bank density, and soil physical characteristics in mobile and stabilized sand dunes. Controlled field and pot experiments were also conducted to assess germination and seedling emergence in different dune soil types and seed burial depths...
March 2018: Ecology and Evolution
Kevin Billet, Julien Genitoni, Michel Bozec, David Renault, Dominique Barloy
In the context of expansion of invasive species, survival of invasive plants is conditioned by their ability to adapt. In France, the water primrose Ludwigia grandiflora , an aquatic invasive species, invades yet wet meadows, leading to a depreciation of their fodder value. Understanding its potential adaption is necessary to its management, strong differences between both morphotypes were expected. So morphological and metabolic responses to terrestrial environment were analyzed for aquatic and terrestrial morphotypes...
March 2018: Ecology and Evolution
Pengcheng Li, Yingying Zhang, Shuangyi Yin, Pengfei Zhu, Ting Pan, Yang Xu, Jieyu Wang, Derong Hao, Huimin Fang, Chenwu Xu, Zefeng Yang
Drought is a major abiotic stress factor limiting maize production, and elucidating the genetic control of root system architecture and plasticity to water-deficit stress is a crucial problem to improve drought adaptability. In this study, 13 root and shoot traits and genetic plasticity were evaluated in a recombinant inbred line (RIL) population under well-watered (WW) and water stress (WS) conditions. Significant phenotypic variation was observed for all observed traits both under WW and WS conditions. Most of the measured traits showed significant genotype-environment interaction (GEI) in both environments...
2018: Frontiers in Plant Science
Bansh N Singh, Padmanabh Dwivedi, Birinchi K Sarma, Gopal S Singh, Harikesh B Singh
Trichoderma spp., are saprophytic fungi that can improve plant growth through increased nutrient acquisition and change in the root architecture. In the present study, we demonstrate that Trichoderma asperellum T42 mediate enhancement in host biomass, total nitrogen content, nitric oxide (NO) production and cytosolic Ca2+ accumulation in tobacco. T42 inoculation enhanced lateral root, root hair length, root hair density and root/shoot dry mass in tobacco under deprived nutrients condition. Interestingly, these growth attributes were further elevated in presence of T42 and supplementation of NO3 - and NH4 + nutrients to tobacco at 40 and 70 days, particularly in NO3 - supplementation, whereas no significant increment was observed in nia30 mutant...
2018: Frontiers in Plant Science
Ta-Cheng Hung, Yi-Hung Liao, Yung-Shen Tsai, Lisa Ferguson-Stegall, Chia-Hua Kuo, Chung-Yu Chen
Despite heat imposes considerable physiological stress to human body, hot water immersion remains as a popular relaxation modality for athletes. Here we examined the lingering effect of hot tub relaxation after training on performance-associated measures and dehydroepiandrosterone sulfate (DHEA-S) in junior archers. Ten national level archers, aged 16.6 ± 0.3 years (M = 8, F = 2), participated in a randomized counter-balanced crossover study after baseline measurements. In particular, half participants were assigned to the hot water immersion (HOT) group, whereas another halves were assigned to the untreated control (CON) group...
March 12, 2018: Chinese Journal of Physiology
Faisal Nadeem, Zeeshan Ahmad, Ruifeng Wang, Jienan Han, Qi Shen, Feiran Chang, Xianmin Diao, Fusuo Zhang, Xuexian Li
Foxtail millet (FM) [ Setaria italica (L.) Beauv.] is a grain and forage crop well adapted to nutrient-poor soils. To date little is known how FM adapts to low nitrogen (LN) at the morphological, physiological, and molecular levels. Using the FM variety Yugu1, we found that LN led to lower chlorophyll contents and N concentrations, and higher root/shoot and C/N ratios and N utilization efficiencies under hydroponic culture. Importantly, enhanced biomass accumulation in the root under LN was in contrast to a smaller root system, as indicated by significant decreases in total root length; crown root number and length; and lateral root number, length, and density...
2018: Frontiers in Plant Science
Kiflemariam Yehuala Belachew, Kerstin A Nagel, Fabio Fiorani, Frederick L Stoddard
Background: Soil moisture deficiency causes yield reduction and instability in faba bean ( Vicia faba L.) production. The extent of sensitivity to drought stress varies across accessions originating from diverse moisture regimes of the world. Hence, we conducted successive greenhouse experiments in pots and rhizotrons to explore diversity in root responses to soil water deficit. Methods: A set of 89 accessions from wet and dry growing regions of the world was defined according to the Focused Identification of Germplasm Strategy and screened in a perlite-sand medium under well watered conditions in a greenhouse experiment...
2018: PeerJ
Jin-Ae Kim, Nikita Bhatnagar, Soon Jae Kwon, Myung Ki Min, Seok-Jun Moon, In Sun Yoon, Taek-Ryoun Kwon, Sun Tae Kim, Beom-Gi Kim
The phytohormone abscisic acid (ABA) enables plants to adapt to adverse environmental conditions through the modulation of metabolic pathways and of growth and developmental programs. We used comparative microarray analysis to identify genes exhibiting ABA-dependent expression and other hormone-dependent expression among them in Oryza sativa shoot and root. We identified 854 genes as significantly up- or down-regulated in root or shoot under ABA treatment condition. Most of these genes had similar expression profiles in root and shoot under ABA treatment condition, whereas 86 genes displayed opposite expression responses in root and shoot...
January 2018: Current Genomics
Shaochun Xu, Pengmei Wang, Yi Zhou, Xiaomei Zhang, Ruiting Gu, Xujia Liu, Bingjian Liu, Xiaoyue Song, Shuai Xu, Shidong Yue
Seagrasses are important components of global coastal ecosystems, and the eelgrass Zostera marina L. is widely distributed along the Atlantic and Pacific coasts in the temperate northern hemisphere, but limited datum related to the contribution of sexual reproduction to population recruitment have been reported. This study aimed to understand eelgrass sexual reproduction and population recruitment in Swan Lake (SLL), and Huiquan Bay (HQB) was included for comparison. Random sampling, permanent quadrats or cores and laboratory seed germination-based experimental methods were employed...
2018: Frontiers in Plant Science
C Foti, E M Khah, O I Pavli
Salinity is one of the most severe environmental stresses, negatively affecting productivity of salt sensitive crop species. Given that germination is a most critical phase in plant lifecycle, the present study is aimed at the determination of seed germination potential, and associated traits, under salt stress conditions as a short-cut approach to identify salt tolerant lentil genotypes. The genetic material consisted of six lentil genotypes whose adaptation to various agroclimatic conditions is not well elucidated...
February 26, 2018: Plant Biology
Anzu Minami, Kenji Yano, Rico Gamuyao, Keisuke Nagai, Takeshi Kuroha, Madoka Ayano, Masanari Nakamori, Masaya Koike, Yuma Kondo, Yoko Niimi, Keiko Kuwata, Takamasa Suzuki, Tetsuya Higashiyama, Yumiko Takebayashi, Mikiko Kojima, Hitoshi Sakakibara, Atsushi Toyoda, Asao Fujiyama, Nori Kurata, Motoyuki Ashikari, Stefan Reuscher
Water submergence is an environmental factor that limits plant growth and survival. Deepwater rice (Oryza sativa) adapts to submergence by rapidly elongating its internodes and thereby maintaining its leaves above the water surface. We performed a comparative RNA sequencing transcriptome analysis of the shoot base region, including basal nodes, internodes and shoot apices of seedlings at two developmental stages from two varieties with contrasting deepwater growth responses. A transcriptomic comparison between deepwater rice C9285 and non-deepwater rice Taichung 65 revealed both similar and differential expression patterns between the two genotypes during submergence...
February 23, 2018: Plant Physiology
James Bunce
Seeds of three C₃ and one C₄ annual weedy species were collected from agricultural fields in Beltsville, Maryland in 1966 and 2006, when atmospheric CO₂ concentrations averaged about 320 and 380 mol mol-1 , respectively. Plants from each collection year were grown over a range of CO₂ concentrations to test for adaptation of these weedy species to recent changes in atmospheric CO₂. In all three of the C₃ species, the increase in CO₂ concentration from 320 mol mol-1 to 380 mol mol-1 increased total dry mass at 24 days in plants from seeds collected in 2006, but not in plants from seeds collected in 1966...
February 19, 2018: Plants (Basel, Switzerland)
Fatemeh Hosseini, Mohammad Reza Mosaddeghi, Anthony Roger Dexter, Mozhgan Sepehri
Under combined drought and mechanical stresses, mechanical stress primarily controlled physiological responses of maize. Piriformospora indica mitigated the adverse effects of stresses, and inoculated maize experienced less oxidative damage and had better adaptation to stressful conditions. The objective of this study was to investigate the effect of maize root colonization by an endophytic fungus P. indica on plant water status, physiological traits and root morphology under combined drought and mechanical stresses...
February 16, 2018: Planta
Ewa Muszyńska, Ewa Hanus-Fajerska, Krystyna Ciarkowska
The approach based on metallophytes during reclamation of grounds contaminated with heavy metals is still sparse. Thus, we investigated the response of D. carthusianorum calamine ecotype to Pb and Cd stress. We focused on in vitro selection of tolerant plant material appropriated to direct use on chemically degraded areas. Shoot cultures were treated with various concentration of Pb or Cd ions. Plantlets status was estimated on the basis of micropropagation efficiency, growth tolerance index (GTI) and physiological analysis...
February 16, 2018: Plant Biology
Imre Cseresnyés, Katalin Szitár, Kálmán Rajkai, Anna Füzy, Péter Mikó, Ramóna Kovács, Tünde Takács
The root electrical capacitance (C R ) method is suitable for assessing root growth and activity, but soil water content (SWC) strongly influences the measurement results. This study aimed to adapt the method for field monitoring by evaluating the effect of SWC on root capacitance to ensure the comparability of C R detected at different SWC. First a pot experiment was conducted with maize and soybean to establish C R -SWC functions for the field soil. Ontogenetic changes in root activity were monitored under field conditions by simultaneously measuring C R and SWC around the roots...
2018: Frontiers in Plant Science
Ming Wang, Neil White, Volker Grimm, Helen Hofman, David Doley, Grant Thorp, Bronwen Cribb, Ella Wherritt, Liqi Han, John Wilkie, Jim Hanan
Background and Aims: Functional-structural plant (FSP) models have been widely used to understand the complex interactions between plant architecture and underlying developmental mechanisms. However, to obtain evidence that a model captures these mechanisms correctly, a clear distinction must be made between model outputs used for calibration and thus verification, and outputs used for validation. In pattern-oriented modelling (POM), multiple verification patterns are used as filters for rejecting unrealistic model structures and parameter combinations, while a second, independent set of patterns is used for validation...
February 7, 2018: Annals of Botany
Mitra Rahmati, José M Mirás-Avalos, Pierre Valsesia, Françoise Lescourret, Michel Génard, Gholam H Davarynejad, Mohammad Bannayan, Majid Azizi, Gilles Vercambre
Climate change projections predict warmer and drier conditions. In general, moderate to severe water stress reduce plant vegetative growth and leaf photosynthesis. However, vegetative and reproductive growths show different sensitivities to water deficit. In fruit trees, water restrictions may have serious implications not only on tree growth and yield, but also on fruit quality, which might be improved. Therefore, it is of paramount importance to understand the complex interrelations among the physiological processes involved in within-tree carbon acquisition and allocation, water uptake and transpiration, organ growth, and fruit composition when affected by water stress...
2018: Frontiers in Plant Science
Walter Zegada-Lizarazu, Gianni Della Rocca, Mauro Centritto, Andrea Parenti, Andrea Monti
Studies at the root level and how the root-shoot interactions may influence the whole crop performance of giant reed (Arundo donax L.) under limited water conditions are largely missing. In the present study, we illustrate the effects of water stress on some phenotypic traits at the root-shoot levels of two giant reed genotypes (from Morocco and Northern Italy), that were reported to have different adaptive hydraulic stem conductivities despite the limited genetic variability of the species. The trial was carried out in one cubic meter rhizotrons (1 x 1 x 1 m) for two consecutive growing seasons...
February 7, 2018: Physiologia Plantarum
Yuval Ben-Abu, Avigdor Beiles, Dvir Flom, Eviatar Nevo
BACKGROUND: "Evolution Canyon" (ECI) at Lower Nahal Oren, Mount Carmel, Israel, is an optimal natural microscale model for unraveling evolution-in-action, highlighting the evolutionary processes of biodiversity evolution, adaptation, and incipient sympatric speciation. A major model organism in ECI is the tetraploid wild emmer wheat, Triticum dicoccoides (TD), the progenitor of cultivated emmer and durum wheat. TD displays dramatic interslope adaptive evolutionary divergence on the tropical, savannoid-hot and dry south-facing, "African" slope (AS), and on the temperate, forested, cool and humid, north-facing, "European" slope (ES), separated on average by 250 m...
2018: PloS One
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"