Abstract:
:The kinetics of leaf vein recovery from cavitation-induced embolism was studied in plants of sunflower cv. Margot, together with the impact of vein embolism on the overall leaf hydraulic conductance (Kleaf). During the air-dehydration of leaves to leaf water potentials (Psi L) of -1.25 MPa, Kleaf was found to decrease by about 46% with respect to values recorded in well-hydrated leaves. When leaves, previously dehydrated to Psi L= -1.1 MPa (corresponding to the turgor loss point), were put in contact with water, Kleaf recovered completely in 10 min and so did leaf water potential. Functional vein density was estimated in both dehydrating and rehydrating leaves in terms of total length of red-stained veins infiltrated with a Phloxine B solution per unit leaf surface area. Veins were found to embolize (unstained) with kinetics showing a linear relationship with Kleaf so that about a 70% loss of functional veins corresponded with a Kleaf loss of 46%. Cavitated veins recovered from embolism within 10 min from the beginning of leaf rehydration. These data indicate that: (a) leaves of sunflower underwent substantial vein embolism during dehydration; (b) vein embolism and leaf hydraulic efficiency apparently recovered from dehydration completely and rapidly upon rehydration; (c) vein refilling occurred while conduits were still at more negative xylem pressures than those required for spontaneous bubble dissolution on the basis of Henry's law. The possible consistent contribution of vital mechanisms for vein refilling is discussed.
journal_name
J Exp Botjournal_title
Journal of experimental botanyauthors
Trifilò P,Gascó A,Raimondo F,Nardini A,Salleo Sdoi
10.1093/jxb/erg259keywords:
subject
Has Abstractpub_date
2003-10-01 00:00:00pages
2323-30issue
391eissn
0022-0957issn
1460-2431pii
54/391/2323journal_volume
54pub_type
杂志文章abstract::While the general effect of CO2 enrichment on photosynthesis, stomatal conductance, N content, and yield has been documented, there is still some uncertainty as to whether there are interactive effects between CO2 enrichment and other factors, such as temperature, geographical location, water availability, and cultiva...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/eraa330
更新日期:2020-10-07 00:00:00
abstract::Plant programmed cell death (PCD) is a genetically controlled process that plays an important role in development and stress responses. Reactive oxygen species (ROS) are key inducers of PCD. The addition of 50 mM H₂O₂ to tobacco Bright Yellow-2 (TBY-2) cell cultures induces PCD. A comparative proteomic analysis of TBY...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/ers031
更新日期:2012-05-01 00:00:00
abstract::The integration of signals received by a cell, and their transduction to targets, is essential for all cellular responses. The cytoskeleton has been identified as a major target of signalling cascades in both animal and plant cells. Self-incompatibility (SI) in Papaver rhoeas involves an allele-specific recognition be...
journal_title:Journal of experimental botany
pub_type: 杂志文章,评审
doi:10.1093/jxb/erg003
更新日期:2003-01-01 00:00:00
abstract::In photosynthetic tissues of the CAM plant pineapple (Ananas comosus), storage of soluble sugars in the central vacuole during the daytime and their remobilization at night is required to provide carbon skeletons for nocturnal CO(2) fixation. However, soluble sugars produced photosynthetically must also be exported to...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/ern077
更新日期:2008-01-01 00:00:00
abstract::Fructans are water-soluble fructose oligomers and polymers that are based on sucrose, and have been implicated in protecting plants against water stress. Rice (Oryza sativa L.) is highly sensitive to chilling temperatures, and is not able to synthesize fructans. Two wheat fructan-synthesizing enzymes, sucrose:sucrose ...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erm367
更新日期:2008-01-01 00:00:00
abstract::Drivers behind food security and crop protection issues are discussed in relation to food losses caused by pests. Pests globally consume food estimated to feed an additional one billion people. Key drivers include rapid human population increase, climate change, loss of beneficial on-farm biodiversity, reduction in pe...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/err064
更新日期:2011-06-01 00:00:00
abstract::The two-fold purpose of this work is, first, to review current hypotheses for multiple paths of sugar-sensing in an oxygen-responsive context, and second, to present evidence for the extent of sugar/oxygen overlap regulating genes for sucrose and ethanol metabolism. Current data indicate that sugar signals in plants m...
journal_title:Journal of experimental botany
pub_type: 杂志文章,评审
doi:10.1093/jexbot/51.suppl_1.417
更新日期:2000-02-01 00:00:00
abstract::Small non-coding RNAs are key post-transcriptional and transcriptional regulators of plant gene expression in angiosperm sporophytes. In recent years, gametophytic small RNAs have also been investigated, predominantly in Arabidopsis male gametophytes, revealing features in common with the sporophyte as well as some su...
journal_title:Journal of experimental botany
pub_type: 杂志文章,评审
doi:10.1093/jxb/erq399
更新日期:2011-03-01 00:00:00
abstract::Ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco) activation decreases under moderate heat stress. This decrease is caused by an impairment of activase function, which is exacerbated by faster rates of Rubisco deactivation at elevated temperatures. To determine if stromal oxidation causes inhibition of activas...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erl140
更新日期:2006-01-01 00:00:00
abstract::A cDNA clone was selected as a candidate for the catalytic subunit of phospho-pyruvate dehydrogenase phosphatase (PDP) by screening a Zea mays expressed sequence tag database with the bovine PDP deduced amino acid sequence. Both strands of the cDNA were completely sequenced. The maize clone contains an open reading fr...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:
更新日期:2001-08-01 00:00:00
abstract::Seed dormancy release of the obligate root parasitic plant, Phelipanche ramosa, requires a minimum 4-day conditioning period followed by stimulation by host-derived germination stimulants, such as strigolactones. Germination is then mediated by germination stimulant-dependent activation of PrCYP707A1, an abscisic acid...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erv119
更新日期:2015-06-01 00:00:00
abstract::The interaction of photosynthesis and respiration has been studied in vivo under conditions of limited water supply and after consecutive rewatering. The role of the alternative (v(alt)) and cytochrome (v(cyt)) pathways on drought stress-induced suppression of photosynthesis and during photosynthetic recovery was exam...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erp344
更新日期:2010-03-01 00:00:00
abstract::Nitrogen-fixing bacteria have been isolated from sugarcane in an endophytic and beneficial interaction that promotes plant growth. In this work, for the first time, the involvement of ethylene signalling in this interaction was investigated by molecular characterizing members of this pathway in sugarcane. The expressi...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erl242
更新日期:2007-01-01 00:00:00
abstract::To elucidate the phytohormonal basis of the feedback regulation of leaf senescence induced by potassium (K) deficiency in cotton (Gossypium hirsutum L.), two cultivars contrasting in sensitivity to K deficiency were self- and reciprocally grafted hypocotyl-to-hypocotyl, using standard grafting (one scion grafted onto ...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/ers238
更新日期:2012-10-01 00:00:00
abstract::The hypersensitive response (HR) is one mechanism of the resistance of plants to pathogen infection. It involves the generation of reactive oxygen species (ROS) which have crucial roles in signal transduction or as toxic agents leading to cell death. Often, ROS generation is accompanied by an ultraweak photon emission...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erl215
更新日期:2007-01-01 00:00:00
abstract::This work examines the involvement of haem oxygenase-1 (HO-1) in salicylic acid (SA)-induced alleviation of oxidative stress as a result of cadmium (Cd) stress in alfalfa (Medicago sativa L.) seedling roots. CdCl(2) exposure caused severe growth inhibition and Cd accumulation, which were potentiated by pre-treatment w...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/ers201
更新日期:2012-09-01 00:00:00
abstract::The production of bioenergy from grasses has been developing quickly during the last decade, with Miscanthus being among the most important choices for production of bioethanol. However, one of the key barriers to producing bioethanol is the lack of information about cell wall structure. Cell walls are thought to disp...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erv183
更新日期:2015-07-01 00:00:00
abstract::A cDNA clone encoding aspartate aminotransferase (PVAAT-2) (EC 2.6.1.1) was isolated from the common bean Phaseolus vulgaris nodule cDNA library. The nucleotide sequence analysis of the full-length cDNA allowed its identification by comparison with sequence databases. The amino acid sequence of the bean PvAAT-2 showed...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erg161
更新日期:2003-06-01 00:00:00
abstract::More than 80% of land plant species benefit from symbiotic partnerships with arbuscular mycorrhizal (AM) fungi that assist in nutrient acquisition and enhance the ability of host plants to adapt to environmental constraints. Host-generated plasma membrane-residing receptor-like kinases and the α/β-hydrolases, e.g. DWA...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/eraa538
更新日期:2020-11-30 00:00:00
abstract::C4 photosynthesis involves a close collaboration of the C3 and C4 metabolic cycles across the mesophyll and bundle-sheath cells. This study investigated the coordination of C4 photosynthesis in maize plants subjected to two salinity (50 and 100mM NaCl) treatments and one shade (20% of full sunlight) treatment. Photosy...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/eru130
更新日期:2014-07-01 00:00:00
abstract::The history of tomato (Solanum lycopersicum L.) improvement includes genetic bottlenecks, wild species introgressions, and divergence into distinct market classes. This history makes tomato an excellent model to investigate the effects of selection on genome variation. A combination of linkage mapping in two F(2) popu...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erq367
更新日期:2011-03-01 00:00:00
abstract::This paper outlines a numerical scheme for accurate, detailed, and high-throughput image analysis of plant roots. In contrast to existing root image analysis tools that focus on root system-average traits, a novel, fully automated and robust approach for the detailed characterization of root traits, based on a graph o...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erv359
更新日期:2015-11-01 00:00:00
abstract::Crotalaria are plants of the Fabaceae family whose nodulation characteristics have been little explored despite the recent discovery of their unexpected ability to be efficiently nodulated in symbiosis with bacteria of the genus Methylobacterium. It has been shown that methylotrophy plays a key role in this unusual sy...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/err083
更新日期:2011-06-01 00:00:00
abstract::Grain yield (GY) of bread wheat (Triticum aestivum L.) is quantitatively inherited. Correlated GY-syndrome traits such as plant height (PH), heading date (HD), thousand grain weight (TGW), test weight (TW), grains per ear (GPE), and ear weight (EW) influence GY. Most quantitative genetics studies assessed the multiple...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erx214
更新日期:2017-07-10 00:00:00
abstract::Drought escape and dehydration avoidance represent alternative strategies for drought adaptation in annual crops. The mechanisms underlying these two strategies are reported to have a negative correlation, suggesting a trade-off. We conducted a quantitative trait locus (QTL) analysis of flowering time and root mass, t...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/eru423
更新日期:2015-01-01 00:00:00
abstract::A method for the quantification of S-RNase levels in single styles of self-incompatible Solanum chacoense was developed and applied toward an experimental determination of the S-RNase threshold required for pollen rejection. It was found that, when single style values are averaged, accumulated levels of the S(11)- and...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/erj147
更新日期:2006-01-01 00:00:00
abstract::Although the mechanisms of nodule N(2) fixation in legumes are now well documented, some uncertainty remains on the metabolic consequences of water deficit. In most cases, little consideration is given to other organs and, therefore, the coordinated changes in metabolism in leaves, roots, and nodules are not well know...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/ers367
更新日期:2013-02-01 00:00:00
abstract::Plant mitochondrial genes contain cis- and trans-group II introns that must be spliced before translation. The mechanism by which these introns are spliced is not well understood. Several families of proteins have been implicated in the intron splicing, of which the pentatricopeptide repeat (PPR) proteins are proposed...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/ery432
更新日期:2019-02-05 00:00:00
abstract::The Arabidopsis thaliana ascorbate-deficient vtc-1 mutant has only 30% ascorbate contents of the wild type (WT). This ascorbate-deficient mutant was used here to study the physiological roles of ascorbate under salt stress in vivo. Salt stress resulted in a more significant decrease in CO2 assimilatory capacity in the...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/eri301
更新日期:2005-12-01 00:00:00
abstract::Although plants are photoautotrophic organisms, they are composed of many heterotrophic tissue systems that must import sugars and amino acids in a process known as assimilate partitioning. While the general features of assimilate partitioning were well described by the early 1980s, little was known about the various ...
journal_title:Journal of experimental botany
pub_type: 杂志文章
doi:10.1093/jxb/47.Special_Issue.1205
更新日期:1996-08-01 00:00:00