분개구리밥-[정명] Wolffia arrhiza (L.) Horkel ex Wimm.

과명	앵글러 Lemnaceae (개구리밥과)	속명	Wolffia (분개구리밥속)
전체학명	[정명] Wolffia arrhiza (L.) Horkel ex Wimm.	추천명	분개구리밥
비추천명	좀분개구리밥	영문명	Rootless duckweed

APG Ⅳ

Araceae (천남성과)

분포

중부 이남

생육환경

연못이나 늪지의 물 위에 난다.

잎

단독 또는 2개의 엽상체가 군체를 한다. 엽상체는 배면은 평탄하고 하부는 비대한 몸속에 가장 폭이 넓은 타원체로 되며 달걀모양 또는 반구형이다. 엽상체는 길이 0.03∼0.08cm, 너비 0.02∼0.05cm이다.

꽃

꽃은 엽상체 표면 중앙 부근의 화공에 1개 달리며 1개의 웅예와 1개의 암술이 있다.

열매

종자는 공모양이다. 겨울에는 엽상체가 전분을 저장하여 식아로 되어 물속에 잠겼다가 이른 봄 식아가 떠올라 새로운 엽상체를 싹 틔운다.

특징

뿌리와 잎맥이 없다. 극히 작은 다년생 부유식물로 다른 부초와 혼생하는 것이 많다.

국가생물종지식정보시스템 > 식물자원 > 식물도감 > 이름으로찾기 (nature.go.kr)

Wolffia arrhiza is a species of flowering plant known by the common names spotless watermeal and rootless duckweed, belonging to the Araceae, a family rich in water-loving species, such as Arum and Pistia. It is the smallest vascular plant on Earth. It is native to Europe, Africa, and parts of Asia, and it is present in other parts of the world as a naturalized species.

Description

Wolffia arrhiza is an aquatic plant which grows in quiet water bodies such as ponds. The green part of the plant, the frond, is a sphere measuring about 1 mm wide, but with a flat top that floats at the water's surface. It has a few parallel rows of stomata. There is no root. The plant produces a minute flower fully equipped with one stamen and one pistil. It often multiplies by vegetative reproduction, however, with the rounded part budding off into a new individual. In cooler conditions the plant becomes dormant and sinks to the bed of the water body to overwinter as a turion. The plant is a mixotroph which can produce its own energy by photosynthesis or absorb it from the environment in the form of dissolved carbon.

Human uses

This tiny plant is a nutritious food. Its green part is about 40% protein by dry weight and its turion is about 40% starch. It contains many amino acids important to the human diet, relatively large amounts of dietary minerals and trace elements such as calcium, magnesium, and zinc, and vitamin B12. It has long been used as a cheap food source in Myanmar, Laos, and Thailand, where it is known as khai-nam ("eggs of the water"). The plant is prolific in its reproduction, growing in floating mats that can be harvested every 3 to 4 days; it has been shown to double its population in less than four days in vitro.

It is also useful as a form of agricultural and municipal water treatment. It is placed in effluent from black tiger shrimp farms to absorb and metabolize pollutants. The plants grow quickly and take up large amounts of nitrogen and phosphorus from the water. The plants that grow in the wastewater can then be used as feed for animals, such as carp, Nile tilapia, and chickens.

 

 

https://youtu.be/t4s_v9UVlsE?t=78