Physiological Plant Pathology最新文献_第2页

Inhibitors of avocado lipoxygenase: their possible relationship with the latency of Colletotrichum gloeosporioides 牛油果脂氧合酶抑制剂及其与炭疽菌潜伏期的可能关系

Physiological Plant Pathology Pub Date : 1985-11-01 Epub Date: 2008-07-21 DOI: 10.1016/0048-4059(85)90040-2

D. Prusky, Ilana Kobiler, Benjamin Jacoby, J.J. Sims, S.L. Midland

{"title":"Inhibitors of avocado lipoxygenase: their possible relationship with the latency of Colletotrichum gloeosporioides","authors":"D. Prusky, Ilana Kobiler, Benjamin Jacoby, J.J. Sims, S.L. Midland","doi":"10.1016/0048-4059(85)90040-2","DOIUrl":"10.1016/0048-4059(85)90040-2","url":null,"abstract":"<div>Linoleate oxidation by avocado lipoxygenase was inhibited in vitro in the presence of the specific inhibitor 5,8,11,14-eicosatetraynoic acid (ETYA). Infiltration with ETYA of avocado discs inoculated with Colletotrichum gloeosporioides delayed symptom development at concentrations where the fungus itself was not affected. Subsequently, a natural inhibitor of avocado lipoxygenase was isolated from peels of unripe avocado fruits and identified as epicatechin. It inhibited avocado lipoxygenase with a Ki of 0·64 μm. The concentration of epicatechin in unripe fruits was 514 μg g− fresh weight of peel; this decreased during ripening to 8 μg g−1 fresh weight, before symptoms of C. gloeosporioides infections were expressed. A comparison of two cultivars with differing susceptibility to C. gloeosporioides showed that the concentration of epicatechin decreased faster in the cultivar in which symptoms appeared first. An atmosphere containing 50 μg l− ethylene enhanced the decrease of the lipoyxygenase inhibitor in avocado fruits and shortened the period before symptoms of disease were expressed. In over-mature, firm and naturally infected fruits hanging in the orchard the concentration of epicatechin was 260 μg g− in the area of the peel without symptoms and only 27 μg g− in that showing symptoms of infection.The results are discussed in relation to the hypothesis that the latency of the infection of avocado fruit by C. gloeosporioides may be accounted for by the degradation of the preformed antifungal compound, cis,cis-1-acetoxy-2-hydroxy-4-oxo-heneicosa-12, 15-diene, which is catalysed by avocado lipoxygenase, and that the in vivo lipoxygenase activity may increase during ripening owing to the decline in the levels of its endogenous inhibitor epicatechin.</div>","PeriodicalId":101028,"journal":{"name":"Physiological Plant Pathology","volume":"27 3","pages":"Pages 269-279"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0048-4059(85)90040-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78598962","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}

引用次数: 46

In vitro sporulation of race 32 of Puccinia graminis Pers. f.sp. tritici Erikss. & Henn 小麦锈菌32小种离体产孢的研究。f.sp。tritici Erikss。& Henn

Physiological Plant Pathology Pub Date : 1985-11-01 Epub Date: 2008-07-21 DOI: 10.1016/0048-4059(85)90039-6

K.H. Kuck , H.J. Reisener

引用次数: 7

Water relations and growth of rust-infected groundsel (Puccinia lagenophorae Cooke; Senecio vulgaris L.) during and after exposure to freezing soil temperatures 土壤锈病对土sel水分关系及生长的影响在暴露于冰冻土壤温度期间和之后

Physiological Plant Pathology Pub Date : 1985-09-01 Epub Date: 2008-07-21 DOI: 10.1016/0048-4059(85)90066-9

N.D. Paul, P.G. Ayres

{"title":"Water relations and growth of rust-infected groundsel (Puccinia lagenophorae Cooke; Senecio vulgaris L.) during and after exposure to freezing soil temperatures","authors":"N.D. Paul, P.G. Ayres","doi":"10.1016/0048-4059(85)90066-9","DOIUrl":"10.1016/0048-4059(85)90066-9","url":null,"abstract":"<div>Groundsel (Senecio vulgaris L.) was grown at three soil temperatures (ambient, and −2 and 6 °C) in an unheated glasshouse during winter in order to examine how a combination of unavailability of soil water due to freezing and of infection by rust (Puccinia lagenophorae Cooke) would affect water relations and growth. Measurements were continued after plants were transferred to a controlled environment room (10 ° C, 12 h light per day) for recovery.Low soil temperatures for 2 or 6 weeks reduced leaf water potential (ψ1) and, over the shorter period, rust exacerbated this reduction. Turgor potential (ψp) also fell during soil freezing, more so in rusted than control plants, but both regained turgor rapidly when freezing ended. However, rust prevented a return to pre-freezing ψ1 during the recovery period. Rust reduced the gain in total dry weight (about 70% of which was leaf dry weight) in plants held at ambient soil temperatures and increased the loss of dry weight of plants held at low soil temperatures; loss of root tissue may have contributed to the inability of rusted plants to regain normal ψ1 during recovery. In both healthy and rusted plants, specific leaf area (area per unit weight) tended to decrease during low temperature treatment and to increase during recovery. Rust inhibited the increase in leaf area during the recovery period, probably because it lowered ψ1 and, consequently, increases in dry weight were inhibited by rust, particularly in plants previously held at −2 °C.</div>","PeriodicalId":101028,"journal":{"name":"Physiological Plant Pathology","volume":"27 2","pages":"Pages 185-196"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0048-4059(85)90066-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79840012","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}

引用次数: 6

Distribution of hydrolytic enzymes at barley powdery mildew encounter sites: implications for resistance associated with papilla formation in a compatible system 水解酶在大麦白粉病发生地点的分布:在一个兼容系统中与乳突形成相关的抗性的含义

Physiological Plant Pathology Pub Date : 1985-09-01 Epub Date: 2008-07-21 DOI: 10.1016/0048-4059(85)90065-7

Kenji Takahashi , James R. Aist, Herbert W. Israel

{"title":"Distribution of hydrolytic enzymes at barley powdery mildew encounter sites: implications for resistance associated with papilla formation in a compatible system","authors":"Kenji Takahashi , James R. Aist, Herbert W. Israel","doi":"10.1016/0048-4059(85)90065-7","DOIUrl":"10.1016/0048-4059(85)90065-7","url":null,"abstract":"<div>Distributions of the hydrolytic enzymes acid phosphatase and non-specific esterase in compatible barley coleoptiles inoculated with Erysiphe graminis fsp. hordei were investigated histochemically by light and electron microscopy. The four different enzymes investigated-acid β-glycerophos-phatase, acid naphthol AS-TR phosphatase, indoxyl acetate esterase and naphthol AS-D acetate esterase—had similar localization patterns. Reaction products were distributed generally in the fungal and host cells, but distinct accumulations were found in certain regions and structures at the encounter sites, including appressoria, penetration pegs, haustoria, papillae, and host cytoplasm. Most papillae showed conspicuous amounts of reaction products, suggesting that papilla formation includes depositions from secretory vesicles derived from the lysosomal system in host cells. There was a marked difference in the apparent concentration of hydrolytic enzyme activity between normal-size papillae accompanied by haustoria (sites of successful penetration) and oversize papillae (sites of unsuccessful penetration). Hydrolytic enzymes, localized most intensively in a lAyer of the oversize papillae, may confer resistance to fungal ingress by degrading components of the penetration pegs.</div>","PeriodicalId":101028,"journal":{"name":"Physiological Plant Pathology","volume":"27 2","pages":"Pages 167-184"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0048-4059(85)90065-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82782663","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}

引用次数: 32

Partial purification and characterization of elicitors for 6-methoxymellein production in cultured carrot cells 胡萝卜细胞6-甲氧基甲基lein诱导子的部分纯化及特性研究

Physiological Plant Pathology Pub Date : 1985-09-01 Epub Date: 2008-07-21 DOI: 10.1016/0048-4059(85)90068-2

Fumiya Kurosaki, Yutaka Tsurusawa, Arasuke Nishi

{"title":"Partial purification and characterization of elicitors for 6-methoxymellein production in cultured carrot cells","authors":"Fumiya Kurosaki, Yutaka Tsurusawa, Arasuke Nishi","doi":"10.1016/0048-4059(85)90068-2","DOIUrl":"10.1016/0048-4059(85)90068-2","url":null,"abstract":"<div>6-Methoxymellein production by cultured carrot cells was elicited by the addition of partial hydrolysates of the pectic substances of carrot cells obtained with pectinase or trypsin. The crude elicitor preparations were fractionated by anion exchange and gel filtration chromatography and resolved into several fractions. The elicitors, which had been purified from the pectinase hydrolysate, were almost completely destroyed by a subsequent treatment with pectinase. However, treatment with Pronase E did not have a significant effect on the activity of the same elicitor preparations indicating that the essential constituent of these elicitors is oligouronide. On the other hand, pectic fragments of carrot cells obtained by tryptic digestion contained at least two distinct types of elicitor active component. One of them lost activity after treatment with Pronase E after it was resistant to pectinase. In contrast, the activity of the other elicitor was reduced by pectinase treatment. It is likely that elicitor for phytoalexin production in carrot is not a single molecular species but rather heterogenous pectic fragments containing an essential moiety such as oligouronide or peptide.</div>","PeriodicalId":101028,"journal":{"name":"Physiological Plant Pathology","volume":"27 2","pages":"Pages 209-217"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0048-4059(85)90068-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80973865","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}

引用次数: 21

Advances in plant pathology 植物病理学进展

Physiological Plant Pathology Pub Date : 1985-09-01 Epub Date: 2008-07-21 DOI: 10.1016/0048-4059(85)90072-4

P.J. Kuhn

引用次数: 0

The effect of age of tomato and maize leaves on resistance to a non-specific and a host specific toxin 番茄和玉米叶片年龄对非特异性和寄主特异性毒素抗性的影响

Physiological Plant Pathology Pub Date : 1985-09-01 Epub Date: 2008-07-21 DOI: 10.1016/0048-4059(85)90064-5

B. Barna, A.R.T. Sarhan, Z. Kiŕaly

引用次数: 13

Phytochemical methods—a guide to modern techniques of plant analysis 植物化学方法-现代植物分析技术指南

Physiological Plant Pathology Pub Date : 1985-09-01 Epub Date: 2008-07-21 DOI: 10.1016/0048-4059(85)90073-6

R. Price

引用次数: 4

Analysis of cross-reactive antigens of Acrocylindrium oryzae and rice in relation to sheath rot disease 稻瘟病与水稻鞘腐病交叉反应抗原分析

Physiological Plant Pathology Pub Date : 1985-09-01 Epub Date: 2008-07-21 DOI: 10.1016/0048-4059(85)90071-2

R.P. Purkayastha, A. Ghosal

引用次数: 13

Changes in cell structure in roots of resistant potatoes parasitized by potato cyst-nematodes. I. Potatoes with resistance gene H1 derived from Solanum tuberosum ssp. andigena 马铃薯囊线虫对抗性马铃薯根系细胞结构的影响。含抗性基因H1的马铃薯。andigena

Physiological Plant Pathology Pub Date : 1985-09-01 Epub Date: 2008-07-21 DOI: 10.1016/0048-4059(85)90069-4

Susan L. Rice , B.S.C. Leadbeater , A.R. Stone

引用次数: 82