{"title":"POSTTRANSLATIONAL ASSEMBLY OF PHOTOSYNTHETIC METALLOPROTEINS.","authors":"Sabeeha Merchant, Beth Welty Dreyfuss","doi":"10.1146/annurev.arplant.49.1.25","DOIUrl":"https://doi.org/10.1146/annurev.arplant.49.1.25","url":null,"abstract":"<p><p>The assembly of chloroplast metalloproteins requires biochemical catalysis. Assembly factors involved in the biosynthesis of metalloproteins might be required to synthesize, chaperone, or transport the cofactor; modify or chaperone the apoprotein; or catalyze cofactor-protein association. Genetic and biochemical approaches have been applied to the study of the assembly of chloroplast iron-sulfur centers, cytochromes, plastocyanin, and the manganese center of photosystem II. These have led to the discovery of NifS-homologues and cysteine desulfhydrase for iron-sulfur center assembly, six loci (CCS1-CCS5, ccsA) for c-type cytochrome assembly, four loci for cytochrome b6 assembly (CCB1-CCB4), the CtpA protease, which is involved in pre-D1 processing, and the PCY2 locus, which is involved in holoplastocyanin accumulation. New assembly factors are likely to be discovered via the study of assembly-defective mutants of Arabidopsis, cyanobacteria, Chlamydomonas, maize, and via the functional analysis of candidate cofactor metabolizing components identified in the genome databases.</p>","PeriodicalId":80493,"journal":{"name":"Annual review of plant physiology and plant molecular biology","volume":"49 ","pages":"25-51"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev.arplant.49.1.25","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40833987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"EVOLUTION OF LIGHT-REGULATED PLANT PROMOTERS.","authors":"Gerardo Arguello-Astorga, Luis Herrera-Estrella","doi":"10.1146/annurev.arplant.49.1.525","DOIUrl":"https://doi.org/10.1146/annurev.arplant.49.1.525","url":null,"abstract":"<p><p>In this review, we address the phylogenetic and structural relationships between light-responsive promoter regions from a range of plant genes, that could explain both their common dependence on specific photoreceptor-associated transduction pathways and their functional versatility. The well-known multipartite light-responsive elements (LREs) of flowering plants share sequences very similar to motifs in the promoters of orthologous genes from conifers, ferns, and mosses, whose genes are expressed in absence of light. Therefore, composite LREs have apparently evolved from cis-regulatory units involved in other promoter functions, a notion with significant implications to our understanding of the structural and functional organization of angiosperm LREs.</p>","PeriodicalId":80493,"journal":{"name":"Annual review of plant physiology and plant molecular biology","volume":"49 ","pages":"525-555"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev.arplant.49.1.525","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40834321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"THEMES IN PLANT DEVELOPMENT.","authors":"Ian Sussex","doi":"10.1146/annurev.arplant.49.1.0","DOIUrl":"https://doi.org/10.1146/annurev.arplant.49.1.0","url":null,"abstract":"","PeriodicalId":80493,"journal":{"name":"Annual review of plant physiology and plant molecular biology","volume":"49 ","pages":"XIII-XII"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev.arplant.49.1.0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40834329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"PLANT CELL WALL PROTEINS.","authors":"Gladys I. Cassab","doi":"10.1146/annurev.arplant.49.1.281","DOIUrl":"https://doi.org/10.1146/annurev.arplant.49.1.281","url":null,"abstract":"<p><p>The nature of cell wall proteins is as varied as the many functions of plant cell walls. With the exception of glycine-rich proteins, all are glycosylated and contain hydroxyproline (Hyp). Again excepting glycine-rich proteins, they also contain highly repetitive sequences that can be shared between them. The majority of cell wall proteins are cross-linked into the wall and probably have structural functions, although they may also participate in morphogenesis. On the other hand, arabinogalactan proteins are readily soluble and possibly play a major role in cell-cell interactions during development. The interactions of these proteins between themselves and with other wall components is still unknown, as is how wall components are assembled. The possible functions of cell wall proteins are suggested based on repetitive sequence, localization in the plant body, and the general morphogenetic pattern in plants.</p>","PeriodicalId":80493,"journal":{"name":"Annual review of plant physiology and plant molecular biology","volume":"49 ","pages":"281-309"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev.arplant.49.1.281","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40834944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"BRASSINOSTEROIDS: Essential Regulators of Plant Growth and Development.","authors":"Steven D. Clouse, Jenneth M. Sasse","doi":"10.1146/annurev.arplant.49.1.427","DOIUrl":"https://doi.org/10.1146/annurev.arplant.49.1.427","url":null,"abstract":"<p><p>Brassinosteroids (BRs) are growth-promoting natural products found at low levels in pollen, seeds, and young vegetative tissues throughout the plant kingdom. Detailed studies of BR biosynthesis and metabolism, coupled with the recent identification of BR-insensitive and BR-deficient mutants, has greatly expanded our view of steroids as signals controlling plant growth and development. This review examines the microchemical and molecular genetic analyses that have provided convincing evidence for an essential role of BRs in diverse developmental programs, including cell expansion, vascular differentiation, etiolation, and reproductive development. Recent advances relevant to the molecular mechanisms of BR-regulated gene expression and BR signal transduction are also discussed.</p>","PeriodicalId":80493,"journal":{"name":"Annual review of plant physiology and plant molecular biology","volume":"49 ","pages":"427-451"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev.arplant.49.1.427","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40834949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"BORON IN PLANT STRUCTURE AND FUNCTION.","authors":"Dale G. Blevins, Krystyna M. Lukaszewski","doi":"10.1146/annurev.arplant.49.1.481","DOIUrl":"https://doi.org/10.1146/annurev.arplant.49.1.481","url":null,"abstract":"New and exciting developments in boron research in the past few years greatly contributed to better understanding of the role of boron in plants. Purification and identification of the first boron-polyol transport molecules resolved much of the controversy about boron phloem mobility. Isolation and characterization of the boron-polysaccharide complex from cell walls provided the first direct evidence for boron crosslinking of pectin polymers. Inhibition and recovery of proton release upon boron withdrawal and restitution in plant culture medium demonstrated boron involvement in membrane processes. Rapid boron-induced changes in membrane function could be attributed to boron-complexing membrane constituents. Boron may affect metabolic pathways by binding apoplastic proteins to cis-hydroxyl groups of cell walls and membranes, and by interfering with manganese-dependent enzymatic reactions. In addition, boron has been implicated in counteracting toxic effects of aluminum on root growth of dicotyledonous plants. Molecular investigations of boron nutrition have been initiated by the discovery of a novel mutant of Arabidopsis thaliana with an altered requirement for boron.","PeriodicalId":80493,"journal":{"name":"Annual review of plant physiology and plant molecular biology","volume":"49 ","pages":"481-500"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev.arplant.49.1.481","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40834951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"PLANT TRANSCRIPTION FACTOR STUDIES.","authors":"C. Schwechheimer, M. Zourelidou, M. W. Bevan","doi":"10.1146/annurev.arplant.49.1.127","DOIUrl":"https://doi.org/10.1146/annurev.arplant.49.1.127","url":null,"abstract":"<p><p>Major advances have been made in understanding the role of transcription factors in gene expression in yeast, Drosophila, and man. Transcription factor modification, synergistic events, protein-protein interactions, and chromatin structure have been successfully integrated into transcription factor studies in these organisms. While many putative transcription factors have been isolated from plants, most of them are only poorly characterized. This review summarizes examples where molecular biological techniques have been successfully employed to study plant transcription factors. The functional analysis of transcription factors is described as well as techniques for studying the interactions of transcription factors with other proteins and with DNA.</p>","PeriodicalId":80493,"journal":{"name":"Annual review of plant physiology and plant molecular biology","volume":"49 ","pages":"127-150"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev.arplant.49.1.127","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40912784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"MOLECULAR-GENETIC ANALYSIS OF PLANT CYTOCHROME P450-DEPENDENT MONOOXYGENASES.","authors":"Clint Chapple","doi":"10.1146/annurev.arplant.49.1.311","DOIUrl":"https://doi.org/10.1146/annurev.arplant.49.1.311","url":null,"abstract":"<p><p>Cytochrome P450-dependent monooxygenases are a large group of heme-containing enzymes, most of which catalyze NADPH- and O2-dependent hydroxylation reactions. The cloning of plant P450s has been hampered because these membrane-localized proteins are typically present in low abundance and are often unstable to purification. Since the cloning of the first plant P450 gene in 1990, there has been an explosion in the rate at which genes encoding plant P450s have been identified. These successes have largely been the result of advances in purification techniques, as well as the application of alternative methods such as mutant- and PCR-based cloning strategies. The availability of these cloned genes has made possible the analysis of P450 gene regulation and may soon reveal aspects of the evolution of P450s in plants. This new knowledge will significantly improve our understanding of many metabolic pathways and may permit their manipulation in the near future.</p>","PeriodicalId":80493,"journal":{"name":"Annual review of plant physiology and plant molecular biology","volume":"49 ","pages":"311-343"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev.arplant.49.1.311","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40834945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"BIOSYNTHESIS AND FUNCTION OF THE SULFOLIPID SULFOQUINOVOSYL DIACYLGLYCEROL.","authors":"Christoph Benning","doi":"10.1146/annurev.arplant.49.1.53","DOIUrl":"https://doi.org/10.1146/annurev.arplant.49.1.53","url":null,"abstract":"<p><p>The sulfolipid sulfoquinovosyl diacylglycerol is an abundant sulfur-containing nonphosphorous glycerolipid that is specifically associated with photosynthetic membranes of higher plants, mosses, ferns, algae, and most photosynthetic bacteria. The characteristic structural feature of sulfoquinovosyl diacylglycerol is the unique head group constituent sulfoquinovose, a derivative of glucose in which the 6-hydroxyl is replaced by a sulfonate group. While there is growing evidence for the final assembly of the sulfolipid by the transfer of the sulfoquinovosyl moiety from UDP-sulfoquinovose to the sn-3 position of diacylglycerol, very little is known about the biosynthesis of the precursor UDP-sulfoquinovose. Recently, a number of mutants deficient in sulfolipid biosynthesis and the corresponding sqd genes have become available from different organisms. These provide novel tools to analyze sulfolipid biosynthesis by a combination of molecular and biochemical approaches. Furthermore, the analysis of sulfolipid-deficient mutants has provided novel insights into the function of sulfoquinovosyl diacylglycerol in photosynthetic membranes.</p>","PeriodicalId":80493,"journal":{"name":"Annual review of plant physiology and plant molecular biology","volume":"49 ","pages":"53-75"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev.arplant.49.1.53","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40912781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ross W. Whetten, John J. MacKay, Ronald R. Sederoff
{"title":"RECENT ADVANCES IN UNDERSTANDING LIGNIN BIOSYNTHESIS.","authors":"Ross W. Whetten, John J. MacKay, Ronald R. Sederoff","doi":"10.1146/annurev.arplant.49.1.585","DOIUrl":"https://doi.org/10.1146/annurev.arplant.49.1.585","url":null,"abstract":"<p><p>After a long period of little change, the basic concepts of lignin biosynthesis have been challenged by new results from genetic modification of lignin content and composition. New techniques for making directed genetic changes in plants, as well as improvements in the analytical techniques used to determine lignin content and composition in plant cell walls, have been used in experimental tests of the accepted lignin biosynthetic pathway. The lignins obtained from genetically modified plants have shown unexpected properties, and these findings have extended the known range of variation in lignin content and composition. These results argue that the accepted lignin biosynthetic pathway is either incomplete or incorrect, or both; and also suggest that plants may have a high level of metabolic plasticity in the formation of lignins. If this is so, the properties of novel lignins could be of significant scientific and practical interest.</p>","PeriodicalId":80493,"journal":{"name":"Annual review of plant physiology and plant molecular biology","volume":"49 ","pages":"585-609"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev.arplant.49.1.585","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40834323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}