TRANSLOCATION AND DISTRIBUTION OF PHOTOASSIMILATES

Question 1

transport of photoassimilates over long distances

Answer 1

translocation

Question 2

translocation occurs in

Answer 2

phloem

Question 3

removing a ring of bark from the wood of young stems by separating the two vascular cambium

Answer 3

girdling

Question 4

Protein found in phloem exudates includes a wide variety of enzymes as well as one
predominant protein

Answer 4

p-protein

Question 5

distinguishing feature of phloem tissue

Answer 5

sieve element

Question 6

an elongated rank of individual cells

Answer 6

sieve elements

Question 7

In addition to sieve elements, phloem tissue also
contains a variety of parenchyma cells. Some of these
cells are intimately associated with the sieve-tube members

Answer 7

companion cells

Question 8

An organ or tissue that
produces more assimilate than it requires for its own
metabolism and growth

Answer 8

source

Question 9

is a net importer or consumer of photoassimilate

Answer 9

sink

Question 10

initial transfer of assimilate
from leaf mesophyll cells into sieve elements of the leaf
minor veins

Answer 10

phloem loading

Question 11

final transfer of assimilate out of the sieve elements into target cells

Answer 11

phloem unloading

Question 12

sucrose is hydrolyzed by the enzyme

Answer 12

acid invertase

Question 13

refers to the metabolic fate of carbon either newly assimilated in the source leaf or delivered to a sink

Answer 13

allocation

Question 14

distribution of assimilate between sinks

Answer 14

partitioning

Question 15

refers to biologically active molecules that are foreign to an organism

Answer 15

xenobiotic