Dictionary > Hatch slack kortshak pathway

Hatch slack kortshak pathway

Definition
noun
A metabolic pathway first determined by Burr and Kortshak in their experiments that later led to its full description by M. D. Hatch and C. R. Slack (in 1966).
In this pathway, the CO2 is first added to phosphoenolpyruvate by the enzyme, PEP carboxylase, producing the four-carbon compound in mesophyll cells that is later transported to bundle sheath cells to liberate the CO2 for use in the Calvin cycle.
Supplement
Instead of the direct carbon fixation in the Calvin cycle like in C3 carbon fixation, the C4 pathway involves steps that first converts pyruvate to phosphoenolpyruvate (PEP) to bind with the CO2 forming a four-carbon compound (hence the name C4). As a result, the photorespiration pathway is bypassed, and the wasteful loss of CO2 common in C3 carbon fixation pathway is minimized.
Plants that first go through the C4 pathway are better adapted than plants that solely go through the C3 pathway under conditions of drought, high temperatures and low nitrogen or CO2 concentrations.
Word origin: from its discoverers, Kortshak, M.D. Hatch and C.R. Slack.
Abbreviation: hsk pathway.
Synonym: Hatch-Slack pathway, C4 carbon fixation pathway.

Compare: C3 carbon fixation pathway, Crassulacean acid metabolism.

See also: C4 plant.


You will also like...

Ecological Research Measuring & Analysis
Ecological Research: Measuring & Analysis

This lesson is about the methods used for ecological research, such as quadrat and transect sampling, canopy fogging, an..

Freshwater Ecology
Freshwater Ecology

Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..

Independent Assortment and Crossing Over
Independent Assortment and Crossing Over

This tutorial describes the independent assortment of chromosomes and crossing over as important events in meiosis. Read..

Ecosystem Succession
Ecosystem Succession

If the balance of nature is left untouched, landscapes can change dramatically over time. A previous ecosystem is supers..

Disturbance on a still water
Abiotic Factors – Water Conditions

A still body of water may be disturbed by a variety of factors. One of them is wind. In fact, it is considered as the pr..

Carbohydrates, fats and proteins - dietary sources
A Balanced Diet – Carbohydrates and Fat

Apart from vitamins, the human body also requires high energy sources such as carbohydrates and fats. If you want an ove..