BOTAONE T2
Botany Lecture AY 22-23
Cell Types and tissues of plants
TRANS: TOPIC
- epidermis
——————Tissue Systems——————
- outer protective layer
I. Dermal
II. Ground
III. Vascular Ground
————Basic Cell/Tissue Types———— - all tissues that are neither dermal nor
I. Parenchyma vascular
• Epidermis - consists of parenchyma, collenchyma, and
> Stomates sclerenchyma tissues
- Guard Cells - carries out basic metabolic functions
- Subsidiary Cells - provide support
> Trichomes - store food or water
- Non-Glandular - allows plants to undergo photosynthesis
- Glandular
> Root hairs
• Biosynthesis of secondary metabolites vascular
• Chlorenchyma - transports water, minerals, and sugars to
• Storage Parenchyma di erent parts of the plant
• Aerenchyma - xylem and phloem
• Stellate Parenchyma - maintains water and sugar balance
II. Collenchyma
• Angular
• Lacunar
• Lamellar
III. Sclerenchyma
• Sclereids
> Brachysclereid
> Macrosclereid
> Osteosclereid
> Astrosclereid
> Trichosclereid
• Fibers
—————Complex Tissue Types—————
I. Xylem
• Vessels
• Tracheids
II. Phloem
• Transport
> Source
> Sink
III. Periderm
IV. Secretory Structures
Basic Cell/tissue types
Basic Tissue types
Parenchyma
Dermal - parenchymal cells/tissues
- thin walled
- thin layer of cells covering soft layers of a - alive during maturity
plant - multifaceted:
- controls interactions with the plants’ - Photosynthesis
surroundings
Joshua Mercado 12230278
ff
, BOTAONE T2
Botany Lecture AY 22-23
Cell Types and tissues of plants
- Storage
- Secretion (glands, trichomes) TRiCHOMES
- Mitosis 1. Non-glandular
- wound-healing - acts in the physical protection against
- cloning biotic and abiotic stress
- Protection - forms a mechanical barrier against low
humidity, high light intensity and
temperatures, and feeding and oviposition
activities of insects
2. Glandular
- specialized hair
- found on the surface of 30% of all
vascular plants
- responsible for plant’s secondary
chemistry
- biosynthesizes specialized metabolites
EpiderMis
Stomates Trichomes Root Hairs
STOMATES
1. Guard Cells
- opening and closing of stomata
- amount of water that enters
- turgor pressure
- the cell should be turgor = lled with water
to open
- related to the concept of osmosis
- increase potassium ions = increase in
water potential
- water ow = allows stomata to open ROOT hairs
- extension of epidermal cell
2. Subsidiary Cells - higher surface water = higher absoption of
- anomocytic (w/p subsidiary cells) water or other materials
- paracytic (w/ lateral subsidiary cells = - Ethylene (100 nM 1-
parallel) aminocyclopropane-1-carboxylic acid,
- tetracytic (w/ both lateral and polar ACC)
subsidiary cells)
- produces ectopic root hairs from non-
hair cell les and enhances root hair
growth
- Auxin (10 nM indole acedic acid, AA)
- enhances root hair growth without
a ecting cell fate
- hydrophobic
- made of wax
- Ascisic acid (ABA)
- inhibits root hair growth
-
Joshua Mercado 12230278
ff
fl fi fi
Botany Lecture AY 22-23
Cell Types and tissues of plants
TRANS: TOPIC
- epidermis
——————Tissue Systems——————
- outer protective layer
I. Dermal
II. Ground
III. Vascular Ground
————Basic Cell/Tissue Types———— - all tissues that are neither dermal nor
I. Parenchyma vascular
• Epidermis - consists of parenchyma, collenchyma, and
> Stomates sclerenchyma tissues
- Guard Cells - carries out basic metabolic functions
- Subsidiary Cells - provide support
> Trichomes - store food or water
- Non-Glandular - allows plants to undergo photosynthesis
- Glandular
> Root hairs
• Biosynthesis of secondary metabolites vascular
• Chlorenchyma - transports water, minerals, and sugars to
• Storage Parenchyma di erent parts of the plant
• Aerenchyma - xylem and phloem
• Stellate Parenchyma - maintains water and sugar balance
II. Collenchyma
• Angular
• Lacunar
• Lamellar
III. Sclerenchyma
• Sclereids
> Brachysclereid
> Macrosclereid
> Osteosclereid
> Astrosclereid
> Trichosclereid
• Fibers
—————Complex Tissue Types—————
I. Xylem
• Vessels
• Tracheids
II. Phloem
• Transport
> Source
> Sink
III. Periderm
IV. Secretory Structures
Basic Cell/tissue types
Basic Tissue types
Parenchyma
Dermal - parenchymal cells/tissues
- thin walled
- thin layer of cells covering soft layers of a - alive during maturity
plant - multifaceted:
- controls interactions with the plants’ - Photosynthesis
surroundings
Joshua Mercado 12230278
ff
, BOTAONE T2
Botany Lecture AY 22-23
Cell Types and tissues of plants
- Storage
- Secretion (glands, trichomes) TRiCHOMES
- Mitosis 1. Non-glandular
- wound-healing - acts in the physical protection against
- cloning biotic and abiotic stress
- Protection - forms a mechanical barrier against low
humidity, high light intensity and
temperatures, and feeding and oviposition
activities of insects
2. Glandular
- specialized hair
- found on the surface of 30% of all
vascular plants
- responsible for plant’s secondary
chemistry
- biosynthesizes specialized metabolites
EpiderMis
Stomates Trichomes Root Hairs
STOMATES
1. Guard Cells
- opening and closing of stomata
- amount of water that enters
- turgor pressure
- the cell should be turgor = lled with water
to open
- related to the concept of osmosis
- increase potassium ions = increase in
water potential
- water ow = allows stomata to open ROOT hairs
- extension of epidermal cell
2. Subsidiary Cells - higher surface water = higher absoption of
- anomocytic (w/p subsidiary cells) water or other materials
- paracytic (w/ lateral subsidiary cells = - Ethylene (100 nM 1-
parallel) aminocyclopropane-1-carboxylic acid,
- tetracytic (w/ both lateral and polar ACC)
subsidiary cells)
- produces ectopic root hairs from non-
hair cell les and enhances root hair
growth
- Auxin (10 nM indole acedic acid, AA)
- enhances root hair growth without
a ecting cell fate
- hydrophobic
- made of wax
- Ascisic acid (ABA)
- inhibits root hair growth
-
Joshua Mercado 12230278
ff
fl fi fi
