from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Botany A complex branched carbohydrate commonly associated with sieve areas of sieve elements.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A plant polysaccharide comprising glucose residues linked together through β-1,3-linkages, produced chiefly in response to wounding and infection.
from the GNU version of the Collaborative International Dictionary of English
- adj. Furnished with protuberant or hardened spots.
from The Century Dictionary and Cyclopedia
- In botany and zoology, having callosities or hard spots; callous; hardened.
Aniline blue staining was carried out to reveal phloem-associated callose in cotyledons and true leaves.
Merged bright-field and aniline-blue stained UV fluorescence images showing the correspondence between xylem and phloem-associated callose
To visualize callose in sieve tube elements in seedlings, aniline blue was used according to
The hyd mutants exhibit ectopic lignin and callose accumulation (Fig. S1), showing a dissociation between cell patterning and wall biochemistry.
Substantial ectopic callose deposition is found, variably associated with xylem traces; bars = 100 µm.
Mauch-Mani B (2004) β-Amionobutyric acid induced resistance against necrotrophic pathogens is based on ABA-dependent priming of callose.
Apart from degraded chitins and glucans, callose also acts as a positive regulator of the hypersensitive response
Conversely, in the case of compatible reactions between susceptible hosts and pathogens, β, 1-3 glucanase-induced callose degradation facilitates the absorption of nutrients by haustoria and promotes growth and sporulation
Fig. S1A), in the hyd mutants callose accumulates ectopically, and is variably associated with xylem traces showing a lack of coordinated differentiation of the two vascular cell types (Supplementary