Navigation Links
Crassulacean acid metabolism


Crassulacean acid metabolism (CAM) is a carbon fixation pathway in some photosynthetic plants. CAM is usually found in plants living under arid conditions, including those found in the desert (for example, cactus). It is named after the plant family it was first discovered in, the crassulaceae.


Synopsis

Plants that are adapted to drier climates are called xerophytes . Some of these plants have adapted small, thick leaves with a reduced surface area. They may also have a thickened cuticle to protect themselves from the environment. The stomata may be sunken into pits. Some xerophytes shed their leaves during the driest seasons and others can store water such as cacti. CAM plants uptake CO2 at night and change it into crassulacean acid that can be broken down during the day for sugars. These plants can close their stomata during the day.

These plants close their stomata (tiny pores used for gas exchange) during the day in order to conserve water. Normally, they wouldn't be able to carry out photosynthesis, since carbon dioxide from the air wouldn't be available. Therefore, their stomata are open during the night, and it is then that they take in carbon dioxide. They store it as malate and other, simple organic compounds. Malate in particular is easily broken down into pyruvate, which can be phosphorylated into PEP and then be recycled to fix more carbon.

In some ways, CAM resembles C4 metabolism, except that CAM plants contain no bundle sheaths around their veins, and C4 metabolism is continuous, while CAM only occurs at night.


'"/>


(Date:3/4/2015)... , Mar. 04, 2015 Research and Markets ... addition of the "Global Biometrics Market Forecast ... The market for biometric authentication systems ... around 14% till 2020 The driving ... increasing security needs, government projects and constant development ...
(Date:3/3/2015)... FOREST, Calif. , March 3, 2015 ... the leading provider of advanced cryogenic logistics ... markets including immunotherapies, stem cells, cell lines, ... and reproductive medicine, today announced the expansion ... Cancer Research Centers, ("Fred Hutch") Clinical ...
(Date:3/2/2015)... 2, 2015 Synaptics Inc. (NASDAQ: ... interface solutions, today announced a new implementation of ... enable rapid and secure transactions and reliable identification ... is a turnkey solution providing mouse and keyboard ... integrate fingerprint ID solutions into their product offerings, ...
Breaking Biology News(10 mins):Global Biometrics Market Forecast and Opportunities, 2020 2Global Biometrics Market Forecast and Opportunities, 2020 3Cryoport, Inc. Expands Support of Fred Hutchinson Cancer Research Center's Clinical Research Division 2Cryoport, Inc. Expands Support of Fred Hutchinson Cancer Research Center's Clinical Research Division 3Synaptics Unveils New Fingerprint ID Solution for Gamers 2Synaptics Unveils New Fingerprint ID Solution for Gamers 3
... published in the Sept. 15 edition of the Journal ... Edward H. Shortliffe, MD, PhD, points out that although ... role that information management and access play in healthcare ... informatics competency being developed in America,s future corps of ...
... RICHMOND, Va. (Sept. 14, 2010) An ... gene for schizophrenia, including a potentially causative mutation, ... The results of the research, led by ... human and molecular genetics in Virginia Commonwealth University,s ...
... clinical trial to assess the use of bone marrow-derived ... infarction (STEMI; severe heart attack) demonstrated a strong safety ... results published in the September issue of the ... adult stem cells, derived from the patient,s own bone ...
Cached Biology News:Informatics = essential MD competency 2VCU study: Team uncovers possible risk gene for schizophrenia 2First US trial of bone-marrow stem cells for heart attack patients proves safe 2
Other biology definitionOther Tags