Module 10A: Plant Hormones Flashcards
are chemicals that plant tissues use to communicate. These substances are
produced in one location but affect cells in another location
hormones
Generally, plant hormones are
transported through the?
plant vascular system
is produced and released by rapidly growing plant tissues. The growing tips of roots, flowers, damaged tissue, and ripening fruit release it.
ethylene
various effects of ethylene include:
fruit ripening, leaf and fruit abscission
converts the starch component of the fruit into simple sugar that imparts sweetness to the fruit.
ripening
iodine results of unripe vs ripe fruits
Unripe fruit is starchy, so it turns dark. Ripe fruit, on the other hand, with most of its starch converted to simple sugar, will appear lighter
where are auxins produced
shoot apical meristem, young leaves, flowers, and fruits
causes the growth of roots and
fruits and prevents the loss of leaves and fruit
auxin
● Chemical substances that regulate plant growth and development
● Produced in small quantities
● Transported to various parts of the plant
plant hormones
Functions of Plant Hormones
● Control growth and differentiation
● Regulate responses to environmental stimuli
● Influence processes like flowering,
fruiting, and aging
Ripening Process
● Involves changes in color, texture,
and flavor
● Conversion of starches to sugars
● Softening of fruit tissue
● Development of characteristic aroma
trigger gene expression
changes leading to ripening
hormones
list of plant hormones:
ethylene, auxins, gibberellins, and abscisic acid
● A gaseous hormone that accelerates
ripening
● Stimulates enzymes that break down cell walls
● Promotes conversion of starches to
sugars
● Enhances color change by breaking down chlorophyll
ethylene
● Ethylene promotes shedding of
leaves
● Involves breakdown of cell walls at
the abscission zone
● Helps plants conserve water during
stress
Leaf Abscission
