HORTICULTURE

HORTICULTURE SCIENCE

ULTRA STRUCTURE OF PLANT CELLS AND ORGANS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which cell does not have a cytoplasm at maturity
A
Guard cells
B
Xylem
C
Sieve tube cells
D
Companion cells
Explanation: 

Detailed explanation-1: -Sclerenchymatous cells get deposited by lignin and lose nucleus & cytoplasm at maturity. Xylem vessels consist of series of elongated dead cells for quick conduction of water and salts.

Detailed explanation-2: -Xylem cells are dead at maturity so they cannot perform photosynthesis. Sugars are transported by phloem (from the leaves to other areas of the plant).

Detailed explanation-3: -Xylem is a plant tissue that is complex and is responsible for water transport and nutrients to the plant. Xylem-type vessel cells can be either alive or dead. According to researchers and botanists, the elements of xylem tissue are dead except for the living parenchyma.

There is 1 question to complete.