Division Ochrophyta: Class Phaeophyceae

Front 1

General Characteristics

Back 1

Multicellular, Temperate, Mostly Marine

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Chlorophyll

Back 2

a, c1,c2,c3

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PIgments

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Fucoxanthin, Neofucoxanthin, B carotene, Chloroplast, Physodes

Front 4

Chloroplast

Back 4

Thylakoids arranged in 3 bands w/girdling lamella, stalked pyrenoids, covered by CER

Front 5

Function of Physodes

Back 5

filtering sunlight, antifoulants, wound plug development

Front 6

Tannins

Back 6

Phlorotannins

Front 7

Tannins Function

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Protection from UV light, may discourage grazing

Front 8

Storage Products

Back 8

Laminarin or Chrysolaminarin, Mannitol

Front 9

Laminarin and Chrysolaminarin

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Found surrounding large single stalked pyrenoid

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Mannitol

Back 10

low molecular sugar alcohol

Front 11

Mannitol Function

Back 11

reserve food and osmoticant

Front 12

_____ cell wall with microfibrils arranged in alternating lamellae

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celluose

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_____ are common & penetrate cell wall in well defined pit fields

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Plasmodesmata

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Algin & Alginic Acid Functions

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cementing agent, ion exchange roles, extracted as phycocolloid

Front 15

Extracted as phycocolloid- ______

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Fucoidan

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Flagella are: ______

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Heterkontous

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Heterkontous

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unequal in length and morphology

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_____ _____ into an ellipsoid to a dorsiventrally flattened monad

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laterally inserted

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____ either isomorphic or heteromorphic

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Haplodiplontic

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______ generation is usually reduced in most heteromorphic life histories

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Gametophytic

Front 21

Reproduction occurs in two types of structures:

______ sporangia or ______ sporangia

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Plurilocular , Unilocular

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Plurilocular Organ

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multicellular organ in which each cell produces a single motile cell

Front 23

In Plurilocular Organ structures derived by _____ divisions

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mitotic

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Plurilocular organ function

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haploid gametangium or zoosporangia

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_____ development of unfused gametes may also occur

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Partehnogenic

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Unilocular Sporangium

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single cell, usually spherical and enlarged, site of meiosis

Front 27

Unilocular Sporangium may be released as:

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non-motile tetraspores or haploid nuclei

Front 28

Types of Growth (4)

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Diffuse, Apical, Trichothalic, Meristodermic

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generalized not localized growth

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Diffuse Growth

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cell divisions are localized at base of one or more filaments

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Trichothalic Growth

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single apical cell, groups of apical cells or marginal cells cut off segments proximally

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Apical Growth

Front 32

layer of superficial meristematic cells divide and add cells centripetally to thallus

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Meristodermic Growth

Front 33

Phaeophyta Members lack multicellular _____ & embryos and _____

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sex organs , chlorophyll b

Front 34

ability of cells to divide in various planes to effect a true tissue

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Polystichous form

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Thallus form may change in response to a variation in such factors as: _____, _____, _____ & ____

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irradiance, water movement, temperature, salinity

Front 36

How do you determine the orders: ____, _____, ____

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Life cycle type, thallus construction, meristematic growth type

Front 37

Life Cycle Types (3)

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Isomorphic, heteromorphic, no free living haploid stage

Front 38

Thallus Construction (3)

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filamentous, pseudoparenchymatous, parenchymatous

Front 39

Life history of this order is an Alternation of Isomorphic Generations

Back 39

Order Ectocarpales

Front 40

This order has a life history of Isomorphic and isogamous

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Order Chordariales

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This order is filamentous to pseudoparenchymatous

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Order Chordariales

Front 42

This order is haplodiplontic with gametophytic and sporophytic phases

Back 42

Order Chordariales

Front 43

This order has a life history that is diplohaplontic in which sporophyte is reduced

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Order Scytosiphonales

Front 44

This order has a Isomorphic haplodiplontic life history

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Order Dictyotales

Front 45

This orders gametophytes are dioecious and sexual reproduction is oogamous

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Order Dictyotales

Front 46

This is order is the sargassum order

Back 46

Order Fucales

Front 47

This order has a diplontic life history & exhibit a pronounced oogamous reproduction with a unique sperm

Back 47

Order Fucales

Front 48

This order has plant construction that is complex with a holdfast, stipe & blade, may also have floats

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Order Fucales