xylem

SMART Vocabulary: related words and phrases

Biochemistry
adipose
adrenalin
albumin
aldosterone
amino acid
endonuclease
endorphin
enzymatic
enzymatically
enzyme
messenger RNA
mRNA
mycoprotein
non-enzymatic
nuclease
spike protein
T level
testosterone
trace element
transfer RNA

phloem | American Dictionary

phloem
noun[ U ]
us/ˈfloʊ·em/
biology
the part of a plant that carries food from the leaves to other parts where the food is needed

Examples of phloem

phloem
Another explanation could be the lack in maize of specific signal sequences for the transport to phloem sap.
It feeds on the phloem in leaf sheaths, causing wilting and drying of the leaves.
Analysis of these sequences demonstrated high similarity among the phloem-restricted isolates and confirmed the existence of 2 main groups.
The term bark is used here to refer collectively to vascular cambium, phloem, cortex and periderm.
By contrast, the developmental changes in phloem sap composition were consistent between years, indicating a role for phloem sap quality in the aphid population crash.
This was attributed in part to a lowered concentration of phloem amino acids and in part to difficulties in achieving phloem ingestion.
Aphids and other pests are obligatory phloem sap feeders, and they represent important prey for beneficial insects such as predators and parasitoids.
Another open question is whether the transgene product could be transported in the phloem sap.
To reach the phloem sieve elements the aphid's stylet mouthparts must pierce a series of plant tissues.
The enlarged cambial cells appeared to crush the phloem and were thus presumed to cause the hopperburn symptom characteristic of the leafhopper damage.
The sugar-rich phloem is a possible niche for such organisms.
It is not known whether disproportionately higher levels of alkaloids in other tissues, principally the phloem, contribute to this aphid resistance.
This result contrasts with plant responses to phloem-feeding insects.
Since aphids are specialist herbivores targeting the phloem sieve element, it is reasonable to expect that changes in gene expression may be phloem-specific.
The specialist race found its host plant faster, reached the phloem sooner, and spent more time feeding than the generalist one.
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.