អ្នកវិទ្យាសាស្ត្ររកឃើញបាក់តេរីទំហំរោមភ្នែក - ធំបំផុតមិនធ្លាប់រកឃើញ

Topline

Scientists in the Caribbean have discovered the largest known bacterium, coming in at one centimeter, or roughly the size of a human eyelash—5,000 times larger than most bacteria.

ការពិតសំខាន់

Scientists on the island of Guadeloupe in the French Lesser Antilles discovered the bacterium in a pile of decaying mangrove leaves, according to a report in the journal វិទ្យាសាស្រ្ត បានផ្សព្វផ្សាយកាលពីថ្ងៃព្រហស្បតិ៍។

The cell—called thiomargarita magnifica—came in at a whopping 10 millimeters, making it the first known bacterium visible with the naked eye.

Most bacterial cells are roughly 2 micrometers (or approximately two-thousandths of a millimeter) in length, and some specimens are as large as 750 micrometers (three-quarters of a millimeter), making the newly-discovered cell roughly 5,000 times larger than most bacteria, according to the study.

After studying the bacterium using fluorescence, x-ray and electron microscopes, scientists realized it can “grow orders of magnitude over theoretical limits for bacterial cell size.”

សម្រង់សំខាន់

Jean-Marie Volland, a researcher at Lawrence Berkeley National Laboratory, told the ទូរទស្សន៍ BBC, “to put things into perspective, it is the equivalent for us humans to encounter another human who would be as tall as Mount Everest.”

ហេតុការណ៍គួរឱ្យភ្ញាក់ផ្អើល

Scientists say the bacterium does not act the same way most other bacteria would in one key way. Unlike most bacteria – which have free-floating DNA – thiomargarita magnifica stores its DNA in separate sections of its body, exhibiting a characteristic resembling eukaryotic cells, the complicated cells that make up plants and animals, Volland told the BBC.

សាវតាសំខាន់

នេះ thiomargarita magnifica specimen was first identified on Guadeloupe in 2009, but was not researched in detail until recently. Bacteria were បានរកឃើញដំបូង in 1675 by Antonie van Leeuenhoek, who observed the organisms in ponds, rainwater and human saliva.

អានបន្ថែម

Record bacterium discovered as long as human eyelash (ប៊ីប៊ីស៊ី)

បាក់តេរី​ប្រវែង​សង់ទីម៉ែត្រ​ជាមួយ DNA ដែល​មាន​នៅក្នុង​សារពាង្គកាយ​ដែល​មាន​ភ្នាស​ដែល​មាន​សកម្មភាព​មេតាបូលីស។ (វិទ្យាសាស្ត្រ)