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Figure 6.4a - DGGE community profiles for Ace Lake and Pendant Lake. Lanes 1-9 are Ace Lake profiles, Lane I= Om, September, followed sequentially paired lanes of 2m, 4m, 8m and 10m. First of each pair relates to a September sample, second of each pair relates to a November sample. Lane 10- 15 are Pendant Lake profiles, 10 & 11 are Om, Sept/Nov; 12 is 2m, Sept; 13 & 14 are 4m, SeptlNov, and Lane 15 is 8m, Sept. Note loss of Ace, Om, November and Pendant Lake, 2m, November. Lost in transit from Antarctica. Pendant Lake 10m, September and November and Pendant Lake, 8m, November are shown in figure 6.4b. Figure 6.4b DGGE - community profiles for Pendant Lake (Pe), Triple Lake jr), Deep Lake (De) and Club Lake (CI). Lanes: I- Pe Om Sept; 2- Pe 10m Nov; 3- Pe 8m Nov; 4- Ac 10m Sept; 5- Pe 4m Sept; 6- Tr Om Sept; 7- Tr 2m Sept; 8- Tr 4m Sept; 9- Tr 4m Nov; 10 Tr 8m Sept; 11 Tr - - 8m Nov; 12 De Om Sept; 13 De Om Nov; 14 Cl Om Sept; 15 Cl Om Nov. Triple Lake, Om & 2m, - - - - November, had identical patterns as indicated by previous DGGE assessment (not shown) and as such only one of each were included. 168
Figure 6.4c - Gel I image showing band matching of Rf values using the Image Master ID elite V3.01 gel analysis software (Amersham Pharmacia Biotech & Non-Linear Dynamics). Red dots denote bands which were selected automatically based on a threshold pixel intensity. Layout as of Figure 6.4a. Figure 6.4d - Gel 2 image showing band matching of Rf values using the Image Master 1D elite V3.01 gel analysis software (Amersham Pharmacia Biotech & Non-Linear Dynamics). Red dots denote bands which were selected automatically based on a threshold pixel intensity. Layout as of figure 6.4b. 169
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COLD ADAPTATION STRATEGIES AND DIVE
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, 71 "If you march your Winter Jour
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1.6.3. Molecular typing techniques
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3.2.1.2.3. DOC and chlorophyll a ..
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5.3.2.5. The Sphingomonas group, is
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LIST OF FIGURES Figure I. I. Diagra
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Figure 3.17a Mean bacterial abundan
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LIST OF TABLES Table 1.1. Types of
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List of Abbreviations AFP AFGP AFLP
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ACKNOWLEDGEMENTS This study was fun
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Chapter 1: INTRODUCTION 1.1 - Tempe
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1999 ; Hand & Burton, 1981) or iden
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Cold adaptation is dependant on the
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not at 25°C is a function of the a
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The most prolific literature on col
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process known as thermal hysteresis
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dominant, role in the ice-growth in
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explanation for this diversity is t
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1.5.3.5 - Membrane bound solute tra
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een well established (Russell & Nic
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& Bowman, 2001; Labrenz & Hirsch, 2
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The reaction mix contains both deox
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gene mixtures and hence can be used
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displaying a high number of common
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AACGTCGAAA AACCTCGAAA (Organism A)
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particular set of environmental par
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Lake Maximum Depth (m) Approximate
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Larsemann Hills __ rp3rtrnent of th
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Sampling trips took two days during
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Sigma, Sigma-Aldrich Company Ltd.,
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oxidized and the sample then conver
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sample. An appropriate volume was l
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min to ensure complete extension of
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Figure 2.3 - Lane delineation image
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Figure 2.6b - Molecular weights are
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RNA 41F (5'-GCT CAG ATT GAA CGC TGG
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I min. The spin column was removed
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compiled using Seqman and any erron
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ecorded and related to the level of
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information regarding the cold adap
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50ppt to 186ppt. Thirteen were sali
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M N N 't M M \p \p 00 kf) M kf) bA
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as would normally be expected, as b
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1444 6ý L CC vý O Q O O NO u 'c z
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5 - 250 3 245 240 G (, -3 235 a 0-
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3.2.2.2.5 - Dissolved organic carbo
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d 14 12 10 14 12 7 10 8 6 4 2 0 00/
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SRP ('g L- 05 10 15 20 2 3 Depth4 5
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3.2.2.3 - Biological characteristic
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a 0 Bacterial Abundance (x 106 ml-1
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3.3 - Discussion 3.3.1 - Summer sam
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to high surface water temperatures
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chemocline (Rankin et al., 1999). M
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a 250 200 150 100 50 70 60 50 40 ý
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The temperature (Fig 3.2a) through
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et al., 1999). No melt out was obse
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increase in ammonium is probably du
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10 7 9 6 8 E ö 7 5 Co u c m c 40 w
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main pigments were chlorophylls a a
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Inorganic nitrogen (NO2, NO3 and NH
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744 -- 7 644 6 19 ü SE 400-- 4 2s
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salinity decreased from July to Sep
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a Bacterial abundance (x 106 1.1) 0
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8 ö a N Ö oý L _> Q O O 4 0 rn O
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undoubtedly true of Club Lake. The
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suggested that input of bacteria an
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Pendant Lake is an unstratified, sa
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non-AFP active peptides from inhibi
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Page 139 and 140: -ý- ---- ,. r. __-_-. ___. r. ýý
Page 141 and 142: 4.2 - Results 4.2.1 - Sampling and
Page 143 and 144: SPLAT score. It has been shown that
Page 145 and 146: 3'E t ý _d M! .PJ r rn 15 3.5 4 3
Page 147 and 148: 4.3 - Discussion Of the 866 bacteri
Page 149 and 150: arisen in very few species due to c
Page 151 and 152: Chapter 5: BACTERIAL MOLECULAR TYPI
Page 153 and 154: Fig 5.1 - Photographs of ARDRA gel
Page 155 and 156: Coefficient: Dice Algorithm: lPGMAA
Page 157 and 158: The closest published relative for
Page 159 and 160: identification was made based on 15
Page 161 and 162: Isolate number Closest phylogenetic
Page 163 and 164: e included due to its small sequenc
Page 165 and 166: 5.3.2 - Identification of the AFP a
Page 167 and 168: explains the fluctuation in related
Page 169 and 170: contamination was lower as the PCR
Page 171 and 172: seen to a certain extent in the ARD
Page 173 and 174: American Type Culture Collection (A
Page 175 and 176: Phylogenetic cluster alignment of t
Page 177 and 178: et al., 1994) and the Antarctic SIM
Page 179 and 180: Chapter 6: BACTERIAL COMMUNITY ANAL
Page 181 and 182: 6.2.1 - Detection of AFP active iso
Page 183 and 184: using the same PCR protocol as orig
Page 185 and 186: Figure 6.1 - Denaturing gradient ge
Page 187: 6.2.2 - Temporal and spatial variat
Page 191 and 192: Coefficient: Dice Algorithm: UPGMA
Page 193 and 194: etween Om and 2m was obviously the
Page 195 and 196: All PCR-based rRNA molecular techni
Page 197 and 198: 6.3.2.3 - Cellular lysis and DNA pu
Page 199 and 200: hybrids should be equal. However, S
Page 201 and 202: contain contaminants. If the profil
Page 203 and 204: (Section 6.3.2.4.3 ) could not be r
Page 205 and 206: most dominant species in the commun
Page 207 and 208: study was characterised as M protea
Page 209 and 210: 11 species) showed AFP activity. Th
Page 211 and 212: that AFP activity could have evolve
Page 213 and 214: 7.2 - Future Work The 19 AFP active
Page 215 and 216: REFERENCES ABYZOV, S. S. (1993). Mi
Page 217 and 218: BELL, E. M. and LAYBOURN-PARRY, J.
Page 219 and 220: Symposium on Environmental Biogeoch
Page 221 and 222: Research. 5,477-493. CLESCERI, L. S
Page 223 and 224: DRICKAMER, K. (1999). C-type lectin
Page 225 and 226: antifreeze proteins from Atlantic s
Page 227 and 228: FRANZMANN, P. D. and DOBSON, S. J.
Page 229 and 230: GRIFFITH, M., ALA, P., YANG. D. S.
Page 231 and 232: IVANOVA, E. P., KIPRIANOVA, E. A.,
Page 233 and 234: Antarctic Ecosystems. G. A. Llano (
Page 235 and 236: Howard-Williams and I. Hawes). Balk
Page 237 and 238: W. (1998). Rep-PCR-mediated genomic
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putida strains from Antarctica. Mic
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NICHOLS, D., BOWMAN, J., SANDERSON,
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PEARCE, D. A. and BUTLER, H. G. (20
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(1999). Palaeohydrological modellin
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tracers of biogeochemical processes
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R. G. Landes Company, Austin, Texas
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partial 16S rDNA sequencing. Applie
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YABUUCHI, E., WANG, L., ARAKAWA, M.
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APPENDICES Al. Media Tryptic Soya A
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"D C 'O I. .. r .. r 6 rr E , 4mo .
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. + + + I I I I I I + I + + I I I I
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Ö ON N M 1 O - N 'zt "o l'" 00 C N
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1 T 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
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1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
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1 1 1 1 I 1 + I I 1 I 1 1 I 1 1 1 I
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1 1 1 1 1 1 1 I I 1 I 1 I 1 1 I T I
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Cl M 'tt tn '. p t- 00 O\ N M O - (
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d' O - (N M 'nt V) \O N. 00 O> N M
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1 1 T 1 1 1 T 1 1 1 1 1 1 1 1 1 1 1
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+ + i i i i i i " i " . + + + + " +
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e O --ý N M t Vn 1,0 [-- 00 O> N M
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FT ce + I I r. to \, O t- 00 O\ N M
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kn 110 r- 00 Oý N M O - N M Itt vn
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, It N M "t N M Iýt N M M M M Oý
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gj a - - - - - - - - - - - - - - -
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