Phloem Transport
Mostrando 1-12 de 166 artigos, teses e dissertações.
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1. Carbohydrate production and transport in cotton cultivars grown under boron deficiency
An adequate supply of boron (B) is required for the optimal growth and development of cotton (Gossypium hirsutum L.) plants, but the low phloem mobility of B limits the possibilities of correcting B deficiency. There are indications that different cotton cultivars could have different responses to B deficiency. The differences in responses of cotton cultivar
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-12
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2. Translocation of the insecticide thiamethoxam in the phloem of castor bean and coffee plants. / TranslocaÃÃo do inseticida tiametoxam no floema de mamoneira e cafeeiro.
It was aimed in this work to investigate the translocation of thiamethoxam in the phloem of castor bean plant, used as model plant, the influence of adjuvants on the penetration of this insecticide in the leaves of this plant and its translocation in the phloem of coffee plant. Castor bean plants with three weeks of age, growing in nutrient solution and coff
Publicado em: 2009
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3. Analise funcional do regulador de transcrição do tipo bZIP AtbZIP9 de Arabidopsis thaliana atraves da superexpressão de seus genes alvos / Fucntional characterization of the Arabidopsis thaliana bZIP transcription factor AtbZIP9 by overexpression of its target genes
Transcriptional regulatory factors (TFs) play an important role in controlling growth and development of ali organisms. bZIPs TFs have been described in ali eukaryotes and are characterized by a basic aminoacid rich DNA binding domain and a leucine zipper, responsible for dimerization. bZIPs have been reported to act in several different plantspecific proces
Publicado em: 2007
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4. Transporte de nitrogenio e metabolismo da aspargina em soja (Glycine Max L.) sob deficiencia na assimilação do nitrogenio
Experiments with soybean plants and other legumes were conducted under greenhouse conditions. Both nodulated and non-nodulated plants were found to present substantially increased aspartic acid levels and lower asparagine in the xylem bleeding sap under conditions that limit nitrogen assimilation. In soybean, the response was reversed when optimum conditions
Publicado em: 2002
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5. Symplasmic Constriction and Ultrastructural Features of the Sieve Element/Companion Cell Complex in the Transport Phloem of Apoplasmically and Symplasmically Phloem-Loading Species1
The ultrastructural features of the sieve element/companion cell complexes were screened in the stem phloem of two symplasmically loading (squash, [Cucurbita maxima L.] and Lythrum salicaria L.) and two apoplasmically loading (broad bean [Vicia faba L.] and Zinnia elegans L.) species. The distinct ultrastructural differences between the companion cells in th
American Society of Plant Physiologists.
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6. Symplastic Continuity between Companion Cells and the Translocation Stream: Long-Distance Transport Is Controlled by Retention and Retrieval Mechanisms in the Phloem1
Substantial symplastic continuity appears to exist between companion cells (CCs) and sieve elements of the phloem, which suggests that small solutes within the CC are subject to indiscriminate long-distance transport via the translocation stream. To test this hypothesis, the distributions of exotic and endogenous solutes synthesized in the CCs of minor veins
American Society of Plant Biologists.
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7. Long-Distance Phloem Transport of Glucosinolates in Arabidopsis1
Glucosinolates are a large group of plant secondary metabolites found mainly in the order Capparales, which includes a large number of economically important Brassica crops and the model plant Arabidopsis. In the present study, several lines of evidence are provided for phloem transport of glucosinolates in Arabidopsis. When radiolabeled p-hydroxybenzyl
American Society of Plant Physiologists.
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8. Phloem Transport of d,l-Glufosinate and Acetyl-l-Glufosinate in Glufosinate-Resistant and -Susceptible Brassica napus1
Phloem transport of d,l-[14C]glufosinate, d-[14C]glufosinate, and acetyl-l-[14C]glufosinate was examined in the susceptible Brassica napus cv Excel and a glufosinate-resistant genotype (HCN27) derived by transformation of cv Excel with the phosphinothricin-N-acetyltransferase (pat) gene. Considerably more 14C was exported from an expanded leaf in HCN27 than
American Society of Plant Physiologists.
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9. Long Distance Translocation of Sucrose, Serine, Leucine, Lysine, and Carbon Dioxide Assimilates: II. Oats 1
To establish whether several amino acids were equally able to enter the phloem of oat (Avena sativa L.) plants and be transported, several 14C-labeled amino acids were applied individually to an abraded spot on a fully expanded source leaf. The base of an immature sink leaf was monitored with a GM tube for time and rate of arrival of radioactivity. Transport
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10. Phloem Metabolism and Function Have to Cope with Low Internal Oxygen1
We have investigated the consequences of endogenous limitations in oxygen delivery for phloem transport in Ricinus communis. In situ oxygen profiles were measured directly across stems of plants growing in air (21% [v/v] oxygen), using a microsensor with a tip diameter of approximately 30 μm. Oxygen levels decreased from 21% (v/v) at the surface to 7% (v/v)
American Society of Plant Biologists.
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11. Cucumber Mosaic Virus Infection Affects Sugar Transport in Melon Plants1
Viral infection often affects carbon assimilation and metabolism in host plants. To better understand the effect of cucumber mosaic virus (CMV) infection on sugar transport, carbohydrate levels and the amounts of the various sugars in the phloem sap were determined in infected melon (Cucumis melo L.) plants. Source leaves infected with CMV were characterized
American Society of Plant Physiologists.
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12. Transport of Organic Solutes in Phloem and Xylem of a Nodulated Legume 1
Collections of xylem exudate of root stumps or detached nodules, and of phloem bleeding sap from stems, petioles, and fruits were made from variously aged plants of Lupinus albus L. relying on nodules for their N supply. Sucrose was the major organic solute of phloem, asparagine, glutamine, serine, aspartic acid, valine, lysine, isoleucine, and leucine, the