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1. Abscisic acid mediates the formation of a suberized stem scar tissue in tomato fruits

Author:
Leide, Jana; Hildebrandt, Ulrich; Hartung, Wolfram; Riederer, Markus; Vogg, Gerd
Source:
The new phytologist 2012 v.194 no.2 pp. 402-415
ISSN:
0028-646X
Subject:
Solanum lycopersicum; abscisic acid; chemical analysis; correlation; fruits; gene expression; mutants; pathogens; suberin; suberization; tissue repair; tomatoes
Abstract:
... • During harvest, fleshy berry tomato fruits (Solanum lycopersicum) were wounded at their stem scar. Within 3 d, this wound was rapidly sealed by a process covering the wound site with a membranous layer which effectively protects the tomato fruit from excessive water loss, nutrient elution and the entry of pathogens. • Chemical analysis of the de novo synthesized stem scar tissue revealed the pre ...
DOI:
10.1111/j.1469-8137.2011.04047.x
PubMed:
22296281

2. A fungal endophyte reinforces population adaptive differentiation in its host grass species

Author:
Gibert, Anaïs; Volaire, Florence; Barre, Philippe; Hazard, Laurent
Source:
The new phytologist 2012 v.194 no.2 pp. 561-571
ISSN:
0028-646X
Subject:
Acremonium lolii; Lolium perenne; biomass production; correlation; fungi; genetic variation; grasses; greenhouse experimentation; hosts; life history; microsatellite repeats; plant adaptation; symbiosis; water stress
Abstract:
... • Hereditary symbioses between fungal endophytes and grasses are relatively recent in the history of plant life. Given < 80 million yr of co‐evolution, symbioses are likely to have impacted plant microevolutionary rather than macroevolutionary processes. Therefore, we investigated the microevolutionary role of the fungal endophyte Neotyphodium lolii in the adaptive differentiation of its host spec ...
DOI:
10.1111/j.1469-8137.2012.04073.x
PubMed:
22404479

3. A meta‐analytical review of the effects of elevated CO2 on plant–arthropod interactions highlights the importance of interacting environmental and biological variables

Author:
Robinson, Emily A.; Ryan, Geraldine D.; Newman, Jonathan A.
Source:
The new phytologist 2012 v.194 no.2 pp. 321-336
ISSN:
0028-646X
Subject:
ambient temperature; animals; carbon dioxide; drought; nitrogen; nitrogen fixation; plant growth; reproductive system; secondary metabolites; soil
Abstract:
... CONTENTS: Summary 321 I. Introduction 322 II. Methods 323 III. Herbivore responses to elevated CO2 328 IV. Plant responses 329 V. Searching for general responses to elevated CO2 332 VI. Limitations and future studies 334 Acknowledgements 335 References 335 SUMMARY: We conducted the most extensive meta‐analysis of plant and animal responses to elevated CO2 to date. We analysed > 5000 data points ex ...
DOI:
10.1111/j.1469-8137.2012.04074.x
PubMed:
22380757

4. Can genetic variability for nitrogen metabolism in the developing ear of maize be exploited to improve yield?

Author:
Cañas, Rafael A.; Quilleré, Isabelle; Gallais, André; Hirel, Bertrand
Source:
The new phytologist 2012 v.194 no.2 pp. 440-452
ISSN:
0028-646X
Subject:
Zea mays; carbon; chromosome mapping; corn; corn ears; genetic background; genetic markers; genetic variation; glutamine; major genes; nitrogen; nitrogen metabolism; quantitative trait loci; seeds; serine
Abstract:
... • Quantitative trait loci (QTLs) for the main steps of nitrogen (N) metabolism in the developing ear of maize (Zea mays L.) and their co‐localization with QTLs for kernel yield and putative candidate genes were searched in order to identify chromosomal regions putatively involved in the determination of yield. • During the grain‐filling period, the changes in physiological traits were monitored in ...
DOI:
10.1111/j.1469-8137.2012.04067.x
PubMed:
22329725

5. Deletion of MP/ARF5 domains III and IV reveals a requirement for Aux/IAA regulation in Arabidopsis leaf vascular patterning

Author:
Krogan, Naden T.; Ckurshumova, Wenzislava; Marcos, Danielle; Caragea, Adriana E.; Berleth, Thomas
Source:
The new phytologist 2012 v.194 no.2 pp. 391-401
ISSN:
0028-646X
Subject:
Arabidopsis; genes; genotype; indole acetic acid; leaf blade; leaf development; mutation; proteins; rooting; vascular tissues
Abstract:
... • Combinatorial interactions of AUXIN RESPONSE FACTORs (ARFs) and auxin/indole acetic acid (Aux/IAA) proteins through their common domains III and IV regulate auxin responses, but insight into the functions of individual proteins is still limited. • As a new tool to explore this regulatory network, we generated a gain‐of‐function ARF genotype by eliminating domains III and IV from the functionally ...
DOI:
10.1111/j.1469-8137.2012.04064.x
PubMed:
22320407

6. Differential daytime and night‐time stomatal behavior in plants from North American deserts

Author:
Ogle, Kiona; Lucas, Richard W.; Bentley, Lisa Patrick; Cable, Jessica M.; Barron‐Gafford, Greg A.; Griffith, Alden; Ignace, Danielle; Jenerette, G. Darrel; Tyler, Anna; Huxman, Travis E.; Loik, Michael E.; Smith, Stanley D.; Tissue, David T.
Source:
The new phytologist 2012 v.194 no.2 pp. 464-476
ISSN:
0028-646X
Subject:
Bayesian theory; basins; deserts; grasses; shrubs; soil water potential; stomatal conductance; stomatal movement; vapor pressure; North America
Abstract:
... • Night‐time stomatal conductance (gnight) occurs in many ecosystems, but the gnight response to environmental drivers is relatively unknown, especially in deserts. • Here, we conducted a Bayesian analysis of stomatal conductance (g) (N = 5013) from 16 species in the Sonoran, Chihuahuan, Mojave and Great Basin Deserts (North America). We partitioned daytime g (gday) and gnight responses by describ ...
DOI:
10.1111/j.1469-8137.2012.04068.x
PubMed:
22348404

7. Direct and indirect influences of 8 yr of nitrogen and phosphorus fertilization on Glomeromycota in an alpine meadow ecosystem

Author:
Liu, Yongjun; Shi, Guoxi; Mao, Lin; Cheng, Gang; Jiang, Shengjing; Ma, Xiaojun; An, Lizhe; Du, Guozhen; Collins Johnson, Nancy; Feng, Huyuan
Source:
The new phytologist 2012 v.194 no.2 pp. 523-535
ISSN:
0028-646X
Subject:
Elymus nutans; Glomeromycota; alpine meadows; botanical composition; ecosystems; hyphae; inputs; mycorrhizal fungi; nitrogen fertilizers; plant communities; plateaus; roots; soil; soil fertility; soil resources; vesicular arbuscular mycorrhizae
Abstract:
... • We measured the influences of soil fertility and plant community composition on Glomeromycota, and tested the prediction of the functional equilibrium hypothesis that increased availability of soil resources will reduce the abundance of arbuscular mycorrhizal (AM) fungi. • Communities of plants and AM fungi were measured in mixed roots and in Elymus nutans roots across an experimental fertilizat ...
DOI:
10.1111/j.1469-8137.2012.04050.x
PubMed:
22292929

8. Do thick leaves avoid thermal damage in critically low wind speeds?

Author:
Leigh, A.; Sevanto, S.; Ball, M. C.; Close, J. D.; Ellsworth, D. S.; Knight, C. A.; Nicotra, A. B.; Vogel, S.
Source:
The new phytologist 2012 v.194 no.2 pp. 477-487
ISSN:
0028-646X
Subject:
air; deserts; flora; heat; heat stress; heat tolerance; leaves; mathematical models; reflectance; temperature; transpiration; wind speed
Abstract:
... • Transient lulls in air movement are rarely measured, but can cause leaf temperature to rise rapidly to critical levels. The high heat capacity of thick leaves can damp this rapid change in temperature. However, little is known about the extent to which increased leaf thickness can reduce thermal damage, or how thick leaves would need to be to have biological significance. We evaluated quantitati ...
DOI:
10.1111/j.1469-8137.2012.04058.x
PubMed:
22296328

9. Expression of a bacterial feedback‐insensitive 3‐deoxy‐d‐arabino‐heptulosonate 7‐phosphate synthase of the shikimate pathway in Arabidopsis elucidates potential metabolic bottlenecks between primary and secondary metabolism

Author:
Tzin, Vered; Malitsky, Sergey; Zvi, Michal Moyal Ben; Bedair, Mohamed; Sumner, Lloyd; Aharoni, Asaph; Galili, Gad
Source:
The new phytologist 2012 v.194 no.2 pp. 430-439
ISSN:
0028-646X
Subject:
Arabidopsis; aromatic acids; auxins; carbon; enzymes; genes; glucosinolates; hormones; metabolism; phenylalanine; phenylpropanoids; secondary metabolites; shikimate pathway; transgenic plants; tryptophan
Abstract:
... • The shikimate pathway of plants mediates the conversion of primary carbon metabolites via chorismate into the three aromatic amino acids and to numerous secondary metabolites derived from them. However, the regulation of the shikimate pathway is still far from being understood. We hypothesized that 3‐deoxy‐d‐arabino‐heptulosonate 7‐phosphate synthase (DAHPS) is a key enzyme regulating flux throu ...
DOI:
10.1111/j.1469-8137.2012.04052.x
PubMed:
22296303

10. Intercontinental divergence in the Populus‐associated ectomycorrhizal fungus, Tricholoma populinum

Author:
Grubisha, Lisa C.; Levsen, Nicholas; Olson, Matthew S.; Lee Taylor, D.
Source:
The new phytologist 2012 v.194 no.2 pp. 548-560
ISSN:
0028-646X
Subject:
Populus balsamifera subsp. trichocarpa; Populus tremula; Tricholoma; climate change; ectomycorrhizae; genetic drift; genetic variation; haplotypes; host range; hosts; loci; mutation; mycorrhizal fungi; nucleotide sequences; North America
Abstract:
... • The ectomycorrhizal fungus Tricholoma populinum is host‐specific with Populus species. T. populinum has wind‐dispersed progagules and may be capable of long‐distance dispersal. In this study, we tested the hypothesis of a panmictic population between Scandinavia and North America. • DNA sequences from five nuclear loci were used to assess phylogeographic structure and nucleotide divergence betwe ...
DOI:
10.1111/j.1469-8137.2012.04066.x
PubMed:
22332931

11. Plant genes involved in harbouring symbiotic rhizobia or pathogenic nematodes

Author:
Damiani, Isabelle; Baldacci‐Cresp, Fabien; Hopkins, Julie; Andrio, Emilie; Balzergue, Sandrine; Lecomte, Philippe; Puppo, Alain; Abad, Pierre; Favery, Bruno; Hérouart, Didier
Source:
The new phytologist 2012 v.194 no.2 pp. 511-522
ISSN:
0028-646X
Subject:
Medicago; Meloidogyne incognita; Sinorhizobium meliloti; endocytosis; evolution; galls; gene expression; gene targeting; genes; giant cells; hormones; host specificity; metabolism; pathogens; roots
Abstract:
... • The establishment and development of plant–microorganism interactions involve impressive transcriptomic reprogramming of target plant genes. The symbiont (Sinorhizobium meliloti) and the root knot‐nematode pathogen (Meloidogyne incognita) induce the formation of new root organs, the nodule and the gall, respectively. • Using laser‐assisted microdissection, we specifically monitored, at the cell ...
DOI:
10.1111/j.1469-8137.2011.04046.x
PubMed:
22360638

12. Plant γH2AX foci are required for proper DNA DSB repair responses and colocalize with E2F factors

Author:
Lang, Julien; Smetana, Ondrej; Sanchez‐Calderon, Lenin; Lincker, Frédéric; Genestier, Julie; Schmit, Anne‐Catherine; Houlné, Guy; Chabouté, Marie‐Edith
Source:
The new phytologist 2012 v.194 no.2 pp. 353-363
ISSN:
0028-646X
Subject:
Arabidopsis thaliana; DNA; DNA repair; histones; mammals; multiprotein complexes; roots; tobacco; transcription factors; transcriptional activation; yeasts
Abstract:
... • Cellular responses to DNA double‐strand breaks (DSBs) are linked in mammals and yeasts to the phosphorylated histones H2AX (γH2AX) repair foci which are multiproteic nuclear complexes responsible for DSB sensing and signalling. However, neither the components of these foci nor their role are yet known in plants. • In this paper, we describe the effects of γH2AX deficiency in Arabidopsis thaliana ...
DOI:
10.1111/j.1469-8137.2012.04062.x
PubMed:
22339405

13. Plasticity as a plastic response: how submergence‐induced leaf elongation in Rumex palustris depends on light and nutrient availability in its early life stage

Author:
Huber, Heidrun; Chen, Xin; Hendriks, Marloes; Keijsers, Danny; Voesenek, Laurentius A. C. J.; Pierik, Ronald; Poorter, Hendrik; de Kroon, Hans; Visser, Eric J. W.
Source:
The new phytologist 2012 v.194 no.2 pp. 572-582
ISSN:
0028-646X
Subject:
Rumex palustris; biomass; carbohydrates; developmental stages; early development; environmental factors; leaves; nutrient availability; ontogeny; phenotype; roots; shoots; submergence
Abstract:
... • Plants may experience different environmental cues throughout their development which interact in determining their phenotype. This paper tests the hypothesis that environmental conditions experienced early during ontogeny affect the phenotypic response to subsequent environmental cues. • This hypothesis was tested by exposing different accessions of Rumex palustris to different light and nutrie ...
DOI:
10.1111/j.1469-8137.2012.04075.x
PubMed:
22335539

14. Pleistocene climatic oscillations and the speciation history of an alpine endemic and a widespread arctic‐alpine plant

Author:
Ikeda, Hajime; Carlsen, Tor; Fujii, Noriyuki; Brochmann, Christian; Setoguchi, Hiroaki
Source:
The new phytologist 2012 v.194 no.2 pp. 583-594
ISSN:
0028-646X
Subject:
Cardamine; gene flow; genes; internal transcribed spacers; introgression; plants; population size; speciation
Abstract:
... • Even in cases in which geographic isolation appears to have driven the speciation of regional endemics, range shifts during the Pleistocene climatic oscillations may also have influenced their evolutionary history. Elucidating speciation history can provide novel insights into evolutionary dynamics following climatic oscillations. • We demonstrated a sister relationship between the Japanese alpi ...
DOI:
10.1111/j.1469-8137.2012.04061.x
PubMed:
22329701

15. Red leaf margins indicate increased polygodial content and function as visual signals to reduce herbivory in Pseudowintera colorata

Author:
Cooney, Luke J.; van Klink, John W.; Hughes, Nicole M.; Perry, Nigel B.; Schaefer, H. Martin; Menzies, Ignatius J.; Gould, Kevin S.
Source:
The new phytologist 2012 v.194 no.2 pp. 488-497
ISSN:
0028-646X
Subject:
Ctenopseustis obliquana; color; feeding preferences; larvae; leaves; phytophagous insects; red light; white light
Abstract:
... • Red‐pigmented leaf margins are common, but their functional significance is unknown. We hypothesized that red leaf margins reduce leaf herbivory by signalling to herbivorous insects the presence of increased chemical defences. • Leaves were collected from a natural population of Pseudowintera colorata. Margin size, herbivory damage, anthocyanin content and concentrations of polygodial, a sesquit ...
DOI:
10.1111/j.1469-8137.2012.04063.x
PubMed:
22309352

16. Rootstock control of scion transpiration and its acclimation to water deficit are controlled by different genes

Author:
Marguerit, Elisa; Brendel, Oliver; Lebon, Eric; Van Leeuwen, Cornelis; Ollat, Nathalie
Source:
The new phytologist 2012 v.194 no.2 pp. 416-429
ISSN:
0028-646X
Subject:
Vitis riparia; Vitis vinifera; abscisic acid; acclimation; genes; quantitative trait loci; rootstocks; scions; transpiration; water stress; water supply
Abstract:
... • The stomatal control of transpiration is one of the major strategies by which plants cope with water stress. Here, we investigated the genetic architecture of the rootstock control of scion transpiration‐related traits over a period of 3 yr. • The rootstocks studied were full sibs from a controlled interspecific cross (Vitis vinifera cv. Cabernet Sauvignon × Vitis riparia cv. Gloire de Montpelli ...
DOI:
10.1111/j.1469-8137.2012.04059.x
PubMed:
22335501

17. The Arabidopsis J‐protein AtDjB1 facilitates thermotolerance by protecting cells against heat‐induced oxidative damage

Author:
Zhou, Wei; Zhou, Ting; Li, Mi‐Xin; Zhao, Chun‐Lan; Jia, Ning; Wang, Xing‐Xing; Sun, Yong‐Zhen; Li, Guo‐Liang; Xu, Meng; Zhou, Ren‐Gang; Li, Bing
Source:
The new phytologist 2012 v.194 no.2 pp. 364-378
ISSN:
0028-646X
Subject:
Arabidopsis thaliana; adenosine triphosphate; adenosinetriphosphatase; cell death; genetic techniques and protocols; heat stress; heat tolerance; homeostasis; hydrogen peroxide; proteins; seedlings; viability
Abstract:
... • AtDjB1 belongs to the J‐protein family in Arabidopsis thaliana. Its biological functions in plants are largely unknown. • In this study, we examined the roles of AtDjB1 in resisting heat and oxidative stresses in A. thaliana using reverse genetic analysis. • AtDjB1 knockout plants (atj1‐1) were more sensitive to heat stress than wildtype plants, and displayed decreased concentrations of ascorbat ...
DOI:
10.1111/j.1469-8137.2012.04070.x
PubMed:
22356282

18. The broad‐leaf herbicide 2,4‐dichlorophenoxyacetic acid turns rice into a living trap for a major insect pest and a parasitic wasp

Author:
Xin, Zhaojun; Yu, Zhaonan; Erb, Matthias; Turlings, Ted C. J.; Wang, Baohui; Qi, Jinfeng; Liu, Shengning; Lou, Yonggen
Source:
The new phytologist 2012 v.194 no.2 pp. 498-510
ISSN:
0028-646X
Subject:
Anagrus; Chilo suppressalis; Nilaparvata lugens; auxins; boring insects; catch crops; ethylene; field experimentation; genetics; herbicides; insect traps; jasmonic acid; parasitoids; pest control; plant protection; rice; trypsin inhibitors
Abstract:
... • Synthetic chemical elicitors of plant defense have been touted as a powerful means for sustainable crop protection. Yet, they have never been successfully applied to control insect pests in the field. • We developed a high‐throughput chemical genetics screening system based on a herbivore‐induced linalool synthase promoter fused to a β‐glucuronidase (GUS) reporter construct to test synthetic com ...
DOI:
10.1111/j.1469-8137.2012.04057.x
PubMed:
22313362

19. The magnitude of hydraulic redistribution by plant roots: a review and synthesis of empirical and modeling studies

Author:
Neumann, Rebecca B.; Cardon, Zoe G.
Source:
The new phytologist 2012 v.194 no.2 pp. 337-352
ISSN:
0028-646X
Subject:
ecosystems; environmental impact; longevity; models; photosynthesis; plant characteristics; rain; root systems; roots; soil; soil ecology; transpiration
Abstract:
... CONTENTS: Summary 337 I. Introduction 337 II. Synthesis of the magnitudes of HR across ecosystems 338 III. Hydraulic redistribution models 339 IV. Methodological considerations affecting the magnitude of HR 344 V. Site characteristics affecting the magnitude of HR 346 VI. Plant characteristics affecting the magnitude of HR 347 VII. Conclusions 349 Acknowledgements 350 References 350 SUMMARY: Hydra ...
DOI:
10.1111/j.1469-8137.2012.04088.x
PubMed:
22417121

20. The network structure of plant–arbuscular mycorrhizal fungi

Author:
Montesinos‐Navarro, A.; Segarra‐Moragues, J. G.; Valiente‐Banuet, A.; Verdú, M.
Source:
The new phytologist 2012 v.194 no.2 pp. 536-547
ISSN:
0028-646X
Subject:
mutualism; mycorrhizal fungi; plant communities; prediction; roots
Abstract:
... • Ecological network theory predicts that in mutualistic systems specialists tend to interact with a subset of species with which generalists interact (i.e. nestedness). Approaching plant–arbuscular mycorrhizal fungi (AMF) association using network analyses will allow the generality of this pattern to be expanded to the ubiquitous plant–AMF mutualism. • Based on certain plant–AMF specificity recen ...
DOI:
10.1111/j.1469-8137.2011.04045.x
PubMed:
22269207