This work was supported by Natural Sciences and Engineering Research Council of Canada (grant 402105), Canadian Foundation for Innovation (grant 129087) and Alberta Education and Training (grant AAETRCP-12-026-SEG) to RJC.

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The authors have nothing to disclose.

Crescita delle alghe in un formato miniaturizzato. La miniaturizzazione di colture algali ad un volume coltura 1 ml in una piastra microtiter consente di replicare in un esperimento possa essere aumentata. È importante garantire l&#39;alga è sano durante un esperimento; eseguire una curva di crescita (figura 2), utilizzando il formato micropiastre per valutare vari media algali, al fine di garantire la conformità ai requisiti nutrizionali del alghe. Inoltre, può essere impo...

Il fitoplancton fisiologia è stato tradizionalmente studiato in esperimenti meso-scala che va da 20 ml in beute a 5 L in damigiane 1-7. Questa scala sperimentale richiede subsampling per il monitoraggio sperimentale, come sacrificare campioni replicati per ogni punto di tempo crea un apparato sperimentale ingestibile. La possibilità di aumentare il numero di esperimenti indipendenti mentre si utilizza lo stesso spazio incubatore diurna dalla miniaturizzazione del volume sperimentale per esperimenti di fisiologia alghe sarà ridurre o eliminare le limitazioni di subsampling e pseudo-replica da grandi volumi. Un formato micropiastra è stata sviluppata per biosaggi algali utilizzando un volume di coltura 1 ml per manipolare sperimentalmente alghe in condizioni variabili. Questo piccolo volume sperimentale consente il numero di repliche per aumentare, aumenta la riproducibilità sperimentale a causa di una variabilità diminuita tra i campioni replicati eesperimenti, e consente la vera replica mantenendo controlli sperimentali (ad esempio, colture algali axeniche) per 140 giorni (Figura 2) 12. Questo formato micropiastra è facilmente adattato per una varietà di questioni sperimentali, come ad esempio: un batterio non ha un&#39;interazione simbiotico, neutro o patogeni con il suo ospite algale? È l&#39;aggiunta di un composto o stimolante tossico per un&#39;alga? Queste e altre domande possono essere affrontate in maniera rapida high-throughput con questo nuovo formato 9-11. Una piastra di coltura microtitolo 48 pozzetti permette ogni 1 ml e di essere un apparato sperimentale indipendente che viene campionato ad una sola volta-point. I vari parametri si possono degustare da questo volume 1 ml compreso, ma non solo: fluorescenza della clorofilla e parametri fotochimici utilizzando-modulata in ampiezza WATER-Pulse (WATER-PAM) fluorometria (vedi Materiali e tavolo Equipment) 13. ACQUA-PAM fluorometria è una tecnica rapida e non invasiva che può essere utilizzato per monitorare esperimenti effettuati con alghe 13. Esso consente di misurare l&#39;efficienza fotosintetica e la salute PSII da un piccolo volume di cultura (150-300 ml di cultura diluito in mezzo a un 2 - volume di 4 ml per WATER-PAM) 14,15. Oltre all&#39;acqua-PAM fluorimetria, questa configurazione può essere usata per misurare una varietà di altri parametri tra cui, ma non limitato a: microscopio per visualizzare i batteri attaccati alle cellule algali e cambiamenti nella morfologia cellulare algale; colonia batterica formando unità (CFU) conta; e citometria a flusso per la conta delle cellule algali e sottopopolazioni di identificazione.

<table border="0" cellpadding="0" cellspacing="0" width="1233">
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:413px;">Name of Material/ Equipment</td>
			<td style="width:328px;">Company</td>
			<td style="width:331px;">Catalog Number</td>
			<td style="width:163px;">Comments/Description</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">10 cu. ft. Diurnal Incubator (6012-1)</td>
			<td>Caron Corporate</td>
			<td>112310-6012-1-11</td>
			<td><a href="http://www.caronproducts.com">www.caronproducts.com</a></td>
		</tr>
		<tr height="23">
			<td height="23" style="height:23px;">Nunc EasYFlask 25cm2, Vent/Close Cap, 7mL working volume, 200/Cs&#160;</td>
			<td>Thermo Fisher Scientific</td>
			<td>N156340</td>
			<td><a href="http://www.fishersci.ca">www.fishersci.ca</a></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Multiwell TC Plates &#8211; 48 Well</td>
			<td>BD Biosciences Discovery Labware</td>
			<td>353078</td>
			<td><a href="http://www.bdbiosciences.com/">www.bdbiosciences.com</a></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">P1000 Gilson The Pipetting Standard&#8212;Gilson&#39;s Pipetman</td>
			<td>Mandel Scientific Company Inc.</td>
			<td>GF-F123602</td>
			<td><a href="http://www.mandel.ca">www.mandel.ca</a></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">P10mL Gilson The Pipetting Standard&#8212;Gilson&#39;s Pipetman</td>
			<td>Mandel Scientific Company Inc.</td>
			<td>GF-F161201</td>
			<td><a href="http://www.mandel.ca">www.mandel.ca</a></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Wide Orifice Tips nonsterile [100&#8211;1250 &#181;L]</td>
			<td>VWR International</td>
			<td>89079-468</td>
			<td><a href="http://www.ca.vwr.com">www.ca.vwr.com</a></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Ultrafine Tips nonsterile [100&#8211;1250 &#181;L]</td>
			<td>VWR International</td>
			<td>89079-470</td>
			<td><a href="http://www.ca.vwr.com">www.ca.vwr.com</a></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Finntip 10mL [Vol: 1-10mL]</td>
			<td>Thermo Fisher Scientific</td>
			<td>9402151</td>
			<td><a href="http://www.fishersci.ca">www.fishersci.ca</a></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">WATER-Pulse Amplitude Modulation (Water-ED)</td>
			<td>Heinz Walz GmbH, Effeltrich, Germany</td>
			<td>EDEE0232</td>
			<td><a href="http://www.walz.com">www.walz.com</a></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">15 mm diameter quartz glass cuvette (WATER-K)</td>
			<td>Caron Corporate</td>
			<td></td>
			<td><a href="http://www.caronproducts.com">www.caronproducts.com</a></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Sodium&#160;Chloride&#160;(Crystalline/Certified ACS), Fisher Chemical</td>
			<td>Thermo Fisher Scientific</td>
			<td>Thermo Fisher Scientific</td>
			<td><a href="http://www.fishersci.ca">www.fishersci.ca</a></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">BD Difco Marine Broth 2216</td>
			<td>BD Biosciences Discovery Labware</td>
			<td>BD Biosciences Discovery Labware</td>
			<td><a href="http://www.bdbiosciences.com">www.bdbiosciences.com</a></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">BD Bacto Agar</td>
			<td>BD Biosciences Discovery Labware</td>
			<td>BD Biosciences Discovery Labware</td>
			<td><a href="http://www.bdbiosciences.com">www.bdbiosciences.com</a></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">L1 Medium Kit, 50L</td>
			<td>NCMA [National Center for Marine Algae and Microbiota</td>
			<td>NCMA [National Center for Marine Algae and Microbiota</td>
			<td><a href="http://www.ncma.bigelow.org">www.ncma.bigelow.org</a></td>
		</tr>
	</tbody>
</table>

a small volume bioassay to assess bacterial/phytoplankton co-culture using water-pulse-amplitude-modulated (water-pam) fluorometry

I metodi convenzionali per la manipolazione sperimentale di microalghe hanno impiegato grandi volumi di coltura (20 ml a 5 L), in modo che la cultura può essere sotto-campione durante l&#39;esperimento 1-7. Subsampling di grandi volumi può essere problematico per diverse ragioni: 1) provoca variazione del volume totale e la superficie: rapporto in volume della coltura durante l&#39;esperimento; 2) pseudo-replica (cioè, più campioni dello stesso pallone trattamento 8) è spesso impiegato piuttosto che vere e proprie repliche (cioè, il campionamento da trattamenti ripetute); 3) la durata dell&#39;esperimento è limitata dal volume totale; e 4) colture axeniche o il solito microbiota batterica sono difficili da mantenere durante gli esperimenti a lungo termine, come la contaminazione si verifica comunemente durante sottocampionamento. L&#39;uso di micropiastre consente 1 volumi di coltura ml da utilizzare per ogni replica, con un massimo di 48 trattamenti separati all&#39;internouna piastra di 12,65 cm x 8,5 x 2,2, diminuendo in tal modo il volume sperimentale e consentendo vasta replica senza sottocampionamento alcun trattamento. Inoltre, questa tecnica può essere modificato per adattarsi a una varietà di formati sperimentali tra cui: batterico-alghe co-culture, test algale fisiologia, e la tossina di screening 9-11. Pozzi individuali con un&#39;alga, batterio e / o co-colture possono essere prelevati per numerose procedure di laboratorio, tra cui, ma non solo: WATER-Pulse-modulata in ampiezza (WATER-PAM) fluorometria, microscopia, colonia batterica formando unità (CFU) conti e citometria a flusso. La combinazione del formato micropiastra e WATER-PAM fluorometria consente misurazioni multiple rapide di rendimento fotochimico e di altri parametri fotochimici con bassa variabilità tra i campioni, alta riproducibilità ed evita le tante insidie ​​di sottocampionamento una damigiana o beuta nel corso di un esperimento .

Letture fluorometria WATER-PAM. WATER-Pulse-modulata in ampiezza (PAM) fluorometria è un metodo rapido ed efficace per determinare la fluorescenza (un proxy per il contenuto di clorofilla) e la resa fotosintetica (salute PSII) di colture algali. Il software PAM WinControl genera un foglio di calcolo di valori di dati grezzi per (i seguenti sono i parametri fondamentali per scuri adattato campioni algali): F 0 = fluorescenza delle cellule adattati al buio...

Watch this Scientific Journal Video about A Small Volume Bioassay to Assess Bacterial/Phytoplankton Co-culture Using WATER-Pulse-Amplitude-Modulated WATER-PAM Fluorometry at JoVE.com

A Small Volume Bioassay to Assess Bacterial/Phytoplankton Co-culture Using WATER-Pulse-Amplitude-Modulated WATER-PAM Fluorometry

The goal of this procedure is to demonstrate the reproducibility and adaptability of using a microtiter plate format for microalgal screening. This rapid screen combines WATER-Pulse-Amplitude-Modulated (WATER-PAM) fluorometry to measure photosynthetic yield as an indicator of Photosystem II (PSII) health with small volume bacterial-algal co-cultures.

Un piccolo volume Bioassay per valutare batterica / fitoplancton Co-cultura Utilizzando WATER-Pulse-modulata in ampiezza (WATER-PAM) fluorometria

Conventional methods for experimental manipulation of microalgae have employed large volumes of culture (20 ml to 5 L), so that the culture can be ...

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A Small Volume Bioassay to Assess Bacterial/Phytoplankton Co-culture Using WATER-Pulse-Amplitude-Modulated (WATER-PAM) Fluorometry

10.4K Views.  University of Alberta. The goal of this procedure is to demonstrate the reproducibility and adaptability of using a microtiter plate format for microalgal screening. This rapid screen combines WATER-Pulse-Amplitude-Modulated (WATER-PAM) fluorometry to measure photosynthetic yield as an indicator of Photosystem II (PSII) health with small volume bacterial-algal co-cultures.