PBOT POST LAB Flashcards
It is a collection of similar cells performing an organized function for the plant
PLANT TISSUES
Two types of plant tissues
- MERISTEMATIC TISSUE
- PERMANENT TISSUE
A group of cells that perform or help to perform a common function and have a common origin in plants
PLANT TISSUES
Types of meristematic tissues
- APICAL MERISTEM
- LATERAL MERISTEM
- INTERCALARY MERISTEM
Meristematic plant tissue that is involved in length
APICAL MERISTEM
Meristematic plant tissue involved in the diameter of plant
LATERAL MERISTEM
Meristematic plant tissue involved in the rapid growth of young stem
INTERCALARY MERISTEM
Types of permanent plant tissues
- DERMAL TISSUES
- GROUND TISSUES
- VASCULAR TISSUES
Acts as protection, gas control, and water absorption
DERMAL TISSUES
Has different function based on cell type
GROUND TISSUES
It transport water and nutrients
VASCULAR TISSUES
Types of dermal tissues
- EPIDERMAL (protection, absorbs water and minerals)
- STOMATA (GUARD CELLS) (gas exchange)
- TRICHOMES (reduce transpiration)
Types of ground tissues
- PARENCHYMA (aids in photosynthesis, storage in the roots)
- COLLENCHYMA (shoot support (active))
- SCLERENCHYMA (shoot support (ceased))
Types of vascular tissues
- XYLEM (transport water and nutrients)
- PHLOEM (transport organic compounds)
Simple permanent tissues
- EPIDERMIS
- PARENCHYMA
- COLLENCHYMA
- SCLERENCHYMA
- CORK
- SECRETORY TISSUES
Tissues that are concerned with the secretion of gums, resins, volatile oils, nectar latex, and other substances in plants
SECRETORY TISSUES
Characterized by cells that are THICK-WALLED CELLS
SCHLERENCHYMA
Types of sclerenchyma
- SCLEREIDS
- FIBERS
It serves as the outermost covering of old stems and old roots of woody dicot plants
CORK
Type of cork
SUBERIN
These are the most abundant of all the cell types found in almost all major parts of higher plants
PARENCHYMA
Types of parenchyma
- AERENCHYMA
- CHLORENCHYMA
This is the OUTERMOST LAYER of cells found in all young plant organs
EPIDERMIS
These are elongated cells with irregularly THICK CELL WALLS that provide support and structure
COLLENCHYMA
Complex permanent tissues
- XYLEM
- PHLOEM
Types of xylem complex permanent tissues
- XYLEM FIBERS
- XYLEM PARENCHYMA
- VESSELS
- TRACHEIDS
These are long tubes made up of individual cells that are open at each end and are joined end to end to form the tubes
VESSELS
More or less elongated cells with oblique and tapering end walls
TRACHEIDS
They are angular in cross-section and are dead at maturity
TRACHEIDS
These are smaller in size than ordinary parenchyma cells
XYELM PARENCHYMA
Similar in appearance to ordinary sclerenchyma fibers
XYLEM FIBERS
Tracheids and vessel elements make up the so-called ______ of the xylem
TRACHEARY ELEMENTS
Tracheary elements of the xylem
- SPIRAL
- SCALIFORM
- PITTED TYPE
- RETICULATE
- ANNULAR
Helical or spiral appearance
SPIRAL
With rounded depressions or pore-like structures called pits
PITTED TYPE
Thickenings appear webbed or net-like
RETICULATE
Thickening appear ladder-like
SCALIFORM
Cell wall thickenings in ring like forms
ANNULAR
Types of phloem complex permanent tissues
- COMPANION CELLS
- PHLOEM FIBERS
- PHLOEM PARENCHYMA
- SIEVE TUBE ELEMENTS
Elongated cells joined end to end, forming sieve tubes
SIEVE TUBE ELEMENTS
Look like ordinary parenchyma cells
PHLOEM PARENCHYMA
Small, nucleated parenchymatous cells that are usually associated with some sieve tubes
COMPANION CELLS
Look like ordinary sclerenchyma fibers
PHLOEM FIBERS
What do you call the small pores found on the end walls or cross walled of the sieve tube
SIEVE PLATES
The loss of water from plants in the form of water vapor
TRANSPIRATION
Percentage of the amount of water vapor may escape from the leaves through transpiration
90%
They are very diverse in appearance and function in stress resistance, including excessive light or temperature, and insect and pathogen defense
TRICHOMES
They are usually shaped as hair-like structures, but can also appear as scales, buds or papillae and range from very small unicellular to very big multicellular structures
TRICHOMES
Types of trichomes
- GLANDULAR
- BRANCHED
- STELLATE
- STINGING
- SCALE
Type of trichome which primarily used by plant as defense against herbivore animals
STELLATE
Type of trichome which primarily used by plants as protection from harsh environment
SCALE
Type of trichome which inject substances that cause pain or irritation
STINGING