Measuring C. elegans spatial foraging and food intake using bioluminescent bacteria
Measuring C. elegans spatial foraging and food intake using bioluminescent bacteria
复制标题
使用生物发光细菌测量线虫空间觅食和食物摄入量
DOI:
10.1101/759928
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Ding S
中科院分区:
文献类型:
--
作者:
Ding S
For most animals, feeding includes two behaviours: foraging to find a food patch and food intake once a patch is found. The nematodeCaenorhabditis elegansis a useful model for studying the genetics of both behaviours. However, most methods of measuring feeding in worms quantify either foraging behaviour or food intake but not both. Imaging the depletion of fluorescently labelled bacteria provides information on both the distribution and amount of consumption, but even after patch exhaustion a prominent background signal remains, which complicates quantification. Here, we used a bioluminescentEscherichia colistrain to quantifyC. elegansfeeding. With light emission tightly coupled to active metabolism, only living bacteria are capable of bioluminescence so the signal is lost upon ingestion. We quantified the loss of bioluminescence using N2 reference worms andeat-2mutants, and found a nearly 100-fold increase in signal-to-background ratio and lower background compared to loss of fluorescence. We also quantified feeding using aggregatingnpr-1mutant worms. We found that groups ofnpr-1mutants first clear bacteria from each other before foraging collectively for more food; similarly, during high density swarming, only worms at the migrating front are in contact with bacteria. These results demonstrate the usefulness of bioluminescent bacteria for quantifying feeding and suggest a hygiene hypothesis for the function ofC. elegansaggregation and swarming.
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影响因子:
56.9
作者:
HORVITZ, HR;CHALFIE, M;EVANS, PD
通讯作者:
EVANS, PD
DOI:
10.1016/0006-291x(81)91599-0
发表时间:
1981-01-01
影响因子:
3.1
作者:
BOKMAN, SH;WARD, WW
通讯作者:
WARD, WW
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
C. Llano
通讯作者:
C. Llano
影响因子:
3.3
作者:
D. Raizen;Raymond Y. N. Lee;L. Avery
通讯作者:
D. Raizen;Raymond Y. N. Lee;L. Avery
影响因子:
4.8
作者:
BERNSTEIN, RA
通讯作者:
BERNSTEIN, RA