Symbiotic Fungi: Principles and Practice (Soil Biology)

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70 A. Gobert and C. Plassard with k coefficient for unit conversion, r root radius, d1 and d2 measuring distances from the root surface (Fig. 5.2). 5.4 Equipment and Microelectrode Fabrication 5.4.1 Experimental Set-up 5.4.1.1 Electric Circuit The use of ion-selective microelectrodes needs a controlled environment against electric, electromagnetic and vibration interference, because the measurements are in the pico-Amp value range. The measurements are realised in a Faraday cage on an antivibration table in order to reduce background noise. The measurement set-up is composed of an electric circuit with several resistances (Fig. 5.3). The main resistance is included in the high impedance amplifier (A) (1,015 O). The potential difference between the flowing solution and the backfilling solution of the microelectrode is the generator. The microelectrode (M e, whose resistance is R e) is fixed on a headstage giving a gain of 0.0001 M (Rpa) before entering the amplifier with resistance Ra. The circuit is closed by the pH meter electrode, which acts as a reference electrode (Mref). Fig. 5.3 The measurement set-up of an ion-selective microelectrode
5 Measurement of Net Ion Fluxes Using Ion-Selective Microelectrodes 71 5.4.1.2 Equipment Set-up As described above, specific equipment is needed in order to carry out the flux measurements. Indeed, the current throughout the cocktail is very small and a high impedance electrometer amplifier and background noise protection are needed. 5.4.1.3 Equipment Needed Faraday cage sitting over an ‘‘antivibration’’ table (home-made) Microscope (e.g. 180, from Ealing, http://www.ealingcatalog.com/) with a fitted live camera fixed on the table (i.e. from Sony, http://www.sonybiz.net/) Manual micromanipulators (where the microelectrode holders are fixed, e.g. from Narishige, http://www.narishige.co.jp/) Computer-assisted stage (where the measuring chamber is placed; e.g. from Ealing) Amplifiers (e.g. Axoprobe-1A, Axon Instruments, now available at http://www. moleculardevices.com/) Interface (e.g. MacLab/8e, ADInstruments, http://www.adinstruments.com/) Computer with acquisition software (e.g. Chart V3.3.7, ADIntruments) Monitor (live feed from the camera fixed to the microscope; e.g. Sony) pH meter and electrode (e.g. Metrohm) Optic fibre light source Bottles and tubing for the solution entrance and exit from the chamber The set-up is virtually described in Fig. 5.4, with equipment placed inside and outside of the Faraday cage. 5.4.1.4 Inside the Faraday Cage On the ‘‘antivibration’’ table, the microscope and the computer-assisted stage are the main features. A camera is fixed at the back of the microscope. The table supports some posts with clamps to fix the microelectrode holders (HS-2 Headstage, Axon Instruments, 0.0001 M gain). All the cables are earthed. The chamber holding the root is mounted on the computer-assisted stage. It is designed so that the root system can be continuously perfused with the experimental nutrient solution throughout the measurement. The waste solution coming out of the chamber is collected in a plastic beaker in the cage. 5.4.1.5 Outside the Faraday Cage All the electronic equipment is outside the cage. The electric signal coming from the electrodes is sent to a high-impedance electrometer amplifier (1,015 O) (Axon Instruments, Inc. 1993). Then, the electrometer output is directed via an A/D
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Soil Biology Volume 18 Series Edito
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Ajit Varma l Amit C. Kharkwal Edito
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Foreword So old, so new... More tha
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Foreword vii Little AE, Robinson CJ
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x Preface work in this challenging
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xii Contents 9 Role of Root Exudate
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Contributors L.K. Abbott School of
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Contributors xvii Falko Feldmann Ju
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Contributors xix K. Nara Asian Natu
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Contributors xxi Marc St-Arnaud Ins
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2 A. Das and A. Varma Fig. 1.1 Type
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4 A. Das and A. Varma the scientifi
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6 A. Das and A. Varma 1.3.2 Symbiot
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8 A. Das and A. Varma all the root
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10 A. Das and A. Varma 1. Such poly
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12 A. Das and A. Varma 1.3.3.9 Nitr
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14 A. Das and A. Varma about 1-2 mm
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16 A. Das and A. Varma fixed nitrog
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18 A. Das and A. Varma Mycorrhizae
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7 In Vitro Compartmented Systems to
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Chapter 8 Use of the Autofluorescen
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8 Use of the Autofluorescence Prope
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Chapter 9 Role of Root Exudates and
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9 Role of Root Exudates and Rhizosp
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Chapter 10 Assessing the Mycorrhiza
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10 Assessing the Mycorrhizal Divers
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178 D. Krüger et al. 8. Wash the p
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180 D. Krüger et al. Table 10.1 Ty
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182 D. Krüger et al. appear are in
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184 D. Krüger et al. tool such as
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186 D. Krüger et al. Ishikawa J, T
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188 D. Krüger et al. Sammeth M, Ro
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190 Z.M. Solaiman hyphae have been
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192 Z.M. Solaiman 11.2.2 Isolation
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194 Z.M. Solaiman 11.3 Conclusions
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Chapter 12 Interaction with Soil Mi
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12 Interaction with Soil Microorgan
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Chapter 13 Isolation, Cultivation a
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13 Isolation, Cultivation and In Pl
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228 K. Vogel-Mikusˇ et al. only be
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230 K. Vogel-Mikusˇ et al. Fig. 14
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232 K. Vogel-Mikusˇ et al. such sp
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234 K. Vogel-Mikusˇ et al. STIM de
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236 K. Vogel-Mikusˇ et al. transfe
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Table 14.1 Element concentrations w
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240 K. Vogel-Mikusˇ et al. Fig. 14
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242 K. Vogel-Mikusˇ et al. Frey B,
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244 E. Dumas-Gaudot et al. TEMED N,
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246 E. Dumas-Gaudot et al. system i
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248 E. Dumas-Gaudot et al. Bromophe
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250 E. Dumas-Gaudot et al. taken to
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252 E. Dumas-Gaudot et al. Note 6:
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254 E. Dumas-Gaudot et al. by Bradf
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256 E. Dumas-Gaudot et al. 3. Take
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258 E. Dumas-Gaudot et al. solubili
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260 E. Dumas-Gaudot et al. Table 15
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262 E. Dumas-Gaudot et al. Table 15
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264 E. Dumas-Gaudot et al. Followin
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266 E. Dumas-Gaudot et al. Once hom
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268 E. Dumas-Gaudot et al. to both
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270 E. Dumas-Gaudot et al. were the
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272 E. Dumas-Gaudot et al. Dumas-Ga
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274 E. Dumas-Gaudot et al. Valot B,
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276 P.A. Olsson Fig. 16.1 Schematic
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278 P.A. Olsson Furthermore, C tran
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280 P.A. Olsson in AM fungi and a h
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282 P.A. Olsson (Graham et al. 1995
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284 P.A. Olsson Nakano A, Takahashi
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286 X.H. He et al. In many cases, N
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288 X.H. He et al. Table 17.1 Exper
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290 X.H. He et al. 17.3.1.1 Comment
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Chapter 18 Analyses of Ecophysiolog
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18 Analyses of Ecophysiological Tra
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308 I. Brito et al. fungi, little i
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310 I. Brito et al. 60% of moisture
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312 I. Brito et al. Thompson 1990;
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314 I. Brito et al. 19.8 Crop Rotat
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316 I. Brito et al. References Abbo
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318 I. Brito et al. Smith SE, Read
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320 F. Feldmann et al. inoculum of
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322 F. Feldmann et al. Table 20.1 B
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324 F. Feldmann et al. transferred
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326 F. Feldmann et al. 20.3.3 The A
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328 F. Feldmann et al. Inoculum is
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330 F. Feldmann et al. Fig. 20.5 Pr
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332 F. Feldmann et al. value for th
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334 F. Feldmann et al. of abiotic a
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336 F. Feldmann et al. Lackie SM, B
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338 M. Vestberg and A.C. Cassells b
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340 M. Vestberg and A.C. Cassells M
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342 M. Vestberg and A.C. Cassells a
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344 M. Vestberg and A.C. Cassells T
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346 M. Vestberg and A.C. Cassells d
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348 M. Vestberg and A.C. Cassells M
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350 M. Vestberg and A.C. Cassells 2
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352 M. Vestberg and A.C. Cassells 2
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354 M. Vestberg and A.C. Cassells C
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356 M. Vestberg and A.C. Cassells G
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358 M. Vestberg and A.C. Cassells P
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360 M. Vestberg and A.C. Cassells V
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362 A. Baldi et al. the capabilitie
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364 A. Baldi et al. 22.2.3 Initiati
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366 A. Baldi et al. 2. Place inocul
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368 A. Baldi et al. 22.5 Analysis 2
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370 A. Baldi et al. 22.5.4 Phenylal
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372 A. Baldi et al. Nicholas JB, Jo
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374 A. Baldi et al. Among these, fu
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376 A. Baldi et al. 3. Place one ex
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378 A. Baldi et al. 23.4 Analysis F
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380 A. Baldi et al. Chattopadhyay S
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382 A. Sirrenberg et al. physical c
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384 A. Sirrenberg et al. Fig. 24.1
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390 A. Sirrenberg et al. in Fig. 24
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392 A. Sirrenberg et al. 24.5.2 Tru
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394 K. Haselwandter and G. Winkelma
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404 E. Mohammadi Goltapeh et al. Fi
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406 E. Mohammadi Goltapeh et al. Th
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408 E. Mohammadi Goltapeh et al. 26
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410 E. Mohammadi Goltapeh et al. co
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412 E. Mohammadi Goltapeh et al. Tw
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414 E. Mohammadi Goltapeh et al. Co
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416 E. Mohammadi Goltapeh et al. qu
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418 E. Mohammadi Goltapeh et al. 26
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420 E. Mohammadi Goltapeh et al. Ch
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Index A A. bisporus var. burnettii,
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Index 425 Dark septate root endophy
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Index 427 Leghemoglobin, 11 Lentinu
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Index 429 Proteomics, 244 Protoplas
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Symbiotic Fungi: Principles and Practice (Soil Biology)

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