from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A spongy tissue with large air spaces found between the cells of the stems and leaves of aquatic plants, providing buoyancy and allowing the circulation of gases.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A spongy, airy tissue founds especially in the roots of aquatic plants.
"We knew that in flooded areas plant roots develop aerenchyma," said Lynch.
Roots with aerenchyma are also better during droughts because they can produce deeper roots to acquire moisture from dry soils.
Crop varieties that produce root aerenchyma have metabolically cheaper roots that are better able to explore the soil.
Marsh plants have evolved air spaces ( "aerenchyma tissue") in their stems that allow oxygen to move from the leaves (where oxygen is produced in the process of photosynthesis) to the roots by either diffusion or differences between the leaves and the roots. oxygen conditions by relying on anaerobic respiration.
a homogenous aerenchyma (thin-walled cells separated by large gas-filled spaces).