Plant Cell and Environment最新文献

Improved temperature response functions for models of Rubisco‐limited photosynthesis 改进的Rubisco -限制光合作用模型的温度响应函数

Plant Cell and Environment Pub Date : 2001-02-01 DOI: 10.1046/J.1365-3040.2001.00668.X

C. Bernacchi, E. Singsaas, C. Pimentel, A. Portis, S. Long

{"title":"Improved temperature response functions for models of Rubisco‐limited photosynthesis","authors":"C. Bernacchi, E. Singsaas, C. Pimentel, A. Portis, S. Long","doi":"10.1046/J.1365-3040.2001.00668.X","DOIUrl":"https://doi.org/10.1046/J.1365-3040.2001.00668.X","url":null,"abstract":"Predicting the environmental responses of leaf photosynthesis is central to many models of changes in the future global carbon cycle and terrestrial biosphere. The steadystate biochemical model of C3 photosynthesis of Farquhar et al .( Planta 149, 78‐90, 1980) provides a basis for these larger scale predictions; but a weakness in the application of the model as currently parameterized is the inability to accurately predict carbon assimilation at the range of temperatures over which significant photosynthesis occurs in the natural environment. The temperature functions used in this model have been based on in vitro measurements made over a limited temperature range and require several assumptions of in vivo conditions. Since photosynthetic rates are often Rubisco-limited (ribulose, 1-5 bisphosphate carboxylase/oxygenase) under natural steady-state conditions, inaccuracies in the functions predicting Rubisco kinetic properties at different temperatures may cause significant error. In this study, transgenic tobacco containing only 10% normal levels of Rubisco were used to measure Rubisco-limited photosynthesis over a large range of CO2 concentrations. From the responses of the rate of CO2 assimilation at a wide range of temperatures, and CO2 and O2 concentrations, the temperature functions of Rubisco kinetic properties were estimated in vivo. These differed substantially from previously published functions. These new functions were then used to predict photosynthesis in lemon and found to faithfully mimic the observed pattern of temperature response. There was also a close correspondence with published C3 photosynthesis temperature responses. The results represent an improved ability to model leaf photosynthesis over a wide range of temperatures (10‐40 °C) necessary for predicting carbon uptake by terrestrial C3 systems.","PeriodicalId":342018,"journal":{"name":"Plant Cell and Environment","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123671413","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: 1141

Interactive signalling by phytochromes and cryptochromes generates de‐etiolation homeostasis in Arabidopsis thaliana 光敏色素和隐色素的相互作用信号传导可在拟南芥中产生去黄化稳态

Plant Cell and Environment Pub Date : 2001-02-01 DOI: 10.1046/J.1365-3040.2001.00653.X

M. Mazzella, J. Casal

引用次数: 30

Elevated expression of metal transporter genes in three accessions of the metal hyperaccumulator Thlaspi caerulescens 金属转运体基因在三种金属超积累植物海苔中的表达升高

Plant Cell and Environment Pub Date : 2001-02-01 DOI: 10.1046/J.1365-3040.2001.00666.X

A. Assunção, P. C. Martins, S. Folter, R. Vooijs, H. Schat, M. Aarts

{"title":"Elevated expression of metal transporter genes in three accessions of the metal hyperaccumulator Thlaspi caerulescens","authors":"A. Assunção, P. C. Martins, S. Folter, R. Vooijs, H. Schat, M. Aarts","doi":"10.1046/J.1365-3040.2001.00666.X","DOIUrl":"https://doi.org/10.1046/J.1365-3040.2001.00666.X","url":null,"abstract":"Heavy metal hyperaccumulation in plants is an intriguing and poorly understood phenomenon. Transmembrane metal transporters are assumed to play a key role in this process. We describe the cloning and isolation of three zinc transporter cDNAs from the Zn hyperaccumulator Thlaspi caerulescens. The ZTP1 gene is highly similar to the Arabidopsis ZAT gene. Of the other two, one is most probably an allele of the recently cloned ZNT1 gene from T. caerulescens ( Pence et al; Proceedings of the National Academy of Science USA 97, 4956-4960, 2000). The second, called ZNT2, is a close homologue of ZNT1. All three zinc transporter genes show increased expression in T. caerulescens compared with the non-hyperaccumulator congener T. arvense, suggesting an important role in heavy metal hyperaccumulation. ZNT1 and ZNT2 are predominantly expressed in roots and ZTP1 is mainly expressed in leaves but also in roots. In T. arvense, ZNT1 and ZNT2 are exclusively expressed under conditions of Zn deficiency. Their expression in T. caerulescens is barely Zn-responsive, suggesting that Zn hyperaccumulation might rely on a decreased Zn-induced transcriptional downregulation of these genes. ZTP1 expression was higher in plants from calamine soil than in plants from serpentine or normal soil. The calamine plants were also the most Zn tolerant, suggesting that high ZTP1 expression might contribute to Zn tolerance.","PeriodicalId":342018,"journal":{"name":"Plant Cell and Environment","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127176615","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: 361

Metabolic regulation of leaf respiration and alternative pathway activity in response to phosphate supply 叶片呼吸的代谢调节和替代途径活性对磷供应的响应

Plant Cell and Environment Pub Date : 2001-02-01 DOI: 10.1046/J.1365-3040.2001.00674.X

M. Gonzalez-Meler, L. Giles, R. Thomas, J. Siedow

{"title":"Metabolic regulation of leaf respiration and alternative pathway activity in response to phosphate supply","authors":"M. Gonzalez-Meler, L. Giles, R. Thomas, J. Siedow","doi":"10.1046/J.1365-3040.2001.00674.X","DOIUrl":"https://doi.org/10.1046/J.1365-3040.2001.00674.X","url":null,"abstract":"In this study the question whether the alternative respiratory pathway acts as an electron bypass for the cytochrome pathway under conditions of growth on limited phosphorus in leaves of bean (Phaseolus vulgaris L.), tobacco (Nicotiana tabacum L.) and Gliricidia sepium Walp was investigated. The oxygen isotope fractionation technique was used to assess the in vivo activities of the cytochrome and alternative respiratory pathways in the absence of added inhibitors. The response of respiration to low phosphorus supply varied among species. Growth at low phosphorus reduced cytochrome pathway activity in bean and tobacco. Alternative pathway activity increased only in bean leaves in response to low phosphorus and not in tobacco. In the case of G. sepium, cytochrome pathway activity remained unchanged whereas the alternative pathway activity increased with low nutritional phosphorus. At low phosphorus, alternative oxidase protein levels increased in the leaves of bean and G. sepium but not in tobacco, suggesting a dependence of alternative pathway activity on protein level. Alternative pathway activity was also not correlated with soluble carbohydrate concentration in bean or tobacco at any phosphorus level. These results show that the alternative pathway does not always act as an electron bypass in response to the downstream restriction of the cytochrome pathway imposed by low phosphorus supply. These results suggest that factors in addition to cellular carbohydrate level and adenylate control can act to regulate alternative pathway activity.","PeriodicalId":342018,"journal":{"name":"Plant Cell and Environment","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123846366","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: 108

PLANT AND ANIMAL CELLS PROCESS POSSIBILITIES (Book). 植物和动物细胞加工的可能性(书)。

Plant Cell and Environment Pub Date : 1988-03-01 DOI: 10.1111/1365-3040.ep11604923

E. Paul

引用次数: 0

MOLECULAR BIOLOGY OF CROP IMPROVEMENT (Book). 作物改良分子生物学(书)。

Plant Cell and Environment Pub Date : 1987-12-01 DOI: 10.1111/1365-3040.EP11604767

P. F. Parker

引用次数: 0

STRUCTURE, FUNCTION, AND BIOSYNTHESIS OF PLANT CELL WALLS (Book). 植物细胞壁的结构、功能和生物合成(书)。

Plant Cell and Environment Pub Date : 1985-04-01 DOI: 10.1111/1365-3040.ep11604619

G. Gooday

引用次数: 0

GASEOUS AIR POLLUTANTS AND PLANT METABOLISM (Book). 气态空气污染物与植物代谢(书)。

Plant Cell and Environment Pub Date : 1984-12-01 DOI: 10.1111/1365-3040.ep11572476

D. Fowler

引用次数: 0

MICROMOLECULAR EVOLUTION, SYSTEMATICS AND ECOLOGY (Book). 微分子进化，系统学和生态学(书)。

Plant Cell and Environment Pub Date : 1983-04-01 DOI: 10.1111/1365-3040.ep11588147

J. Harborne

引用次数: 0

A precise potentiometric method for determination of algal activity in an open CO2 system 一种在开放CO2系统中测定藻类活性的精确电位法

Plant Cell and Environment Pub Date : 1983-04-01 DOI: 10.1111/J.1365-3040.1983.TB01893.X

Olof Hofslagare, G. Samuelsson, S. Sjöberg, N. Ingri

引用次数: 17