Magnoliophyta - Angiosperms‘basal angiosperms’ - those groups that are now shown to be the first...
Transcript of Magnoliophyta - Angiosperms‘basal angiosperms’ - those groups that are now shown to be the first...
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Magnoliophyta - AngiospermsSurvey of Angiosperms — using APG system
‘Basal angiosperms’• ANA (‘basal families’)• magnoliid complex• monocots
Eudicots or tricolpates (3 pored pollen)• ranunculids• caryophyllids• rosids• asterids
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We will begin our survey of angiosperms by examining the ‘basal angiosperms’ - those groups that are now shown to be the first diverging – paraphyletic!
We will look at the monocots - a ‘basal angiosperm group’ - at the end of the semester
Basal Angiosperms
These include all those shown here except the eudicots which are the bulk of dicots
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What are basal angiosperms?
Basal Angiosperms
polypetalyhypogynyactinomorphic
(1) Charles Bessey’s order Ranaleswith most of the dicot basal angiosperms
Magnolia = primitive
and (2) monocots
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What are basal angiosperms?
Basal Angiosperms
Exhibit a suite of primitive character states
1. Many parts at each whorl
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What are basal angiosperms?
Basal Angiosperms
Exhibit a suite of primitive character states
1. Many parts at each whorl2. Separate, unsealed carpels
Drimys Winteraceae
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What are basal angiosperms?
Basal Angiosperms
Exhibit a suite of primitive character states
1. Many parts at each whorl2. Separate, unsealed carpels3. Follicle fruits
Leaf-like follicles
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What are basal angiosperms?
Basal Angiosperms
Exhibit a suite of primitive character states
1. Many parts at each whorl2. Separate, unsealed carpels3. Follicle fruits
Laminar stamens in yellow waterlily
4. Laminar stamens
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What are basal angiosperms?
Basal Angiosperms
Exhibit a suite of primitive character states
1. Many parts at each whorl2. Separate, unsealed carpels3. Follicle fruits 4. Laminar stamens 5. Tracheids, no vessel elements
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What are basal angiosperms?
Basal Angiosperms
Exhibit a suite of primitive character states
1. Many parts at each whorl2. Separate, unsealed carpels3. Follicle fruits 4. Laminar stamens 5. Tracheids, no vessel elements 6. Pollen grains single pored,
apertured, furrowed; nottriaperturate, tricolpate
Lilium (monocot)uniaperturate
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The ‘ANA’ group forms a basal grade (paraphyletic)
‘ANA’ Basal Angiosperms
Name derived from initials of members
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*Amborellaceae (order Amborellales)
‘ANA’ Basal Angiosperms
Amborella trichopoda — only 1 species from New Caledonia
* = know this family or group!
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*Amborellaceae (order Amborellales)
‘ANA’ Basal Angiosperms
• dioecious (unisexual) evergreen shrub with no vessels
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*Amborellaceae (order Amborellales)
‘ANA’ Basal Angiosperms
• dioecious (unisexual) evergreen shrub with no vessels• P 5-8 A ¥ G 0 male
• perianth spiralled – tepals• laminar stamens• apocarpic, not sealed• fruits 1 seeded, drupe-like
• P 5-8 A 0 G 5-6 female
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Question: would the “first angiosperm” have had features like
‘ANA’ Basal Angiosperms
Amborella?
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Answer: not necessarily
‘ANA’ Basal Angiosperms
Amborella features could be derived later (over last 100my +)
Read required paper: Sauquet et al. 2017
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Answer: not necessarily
‘ANA’ Basal Angiosperms
Amborella features could be derived later (over last 100my +)
The ancestral flower of angiosperms and its early diversification.
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Austrobaileyaceae: 1 species of tropical Australian evergreen liana
‘ANA’ Basal Angiosperms
P ¥ A ¥ G ¥• spiralled tepals; laminar stamens; fly pollinated; apocarpic - berries
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Illiciaceae
‘ANA’ Basal Angiosperms
• aromatic shrubs/vines, used in anise liquers
• Asian tropics and subtropics & disjunct in Eastern North America
Illicium Schisandra + Kadsura
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Illiciaceae
‘ANA’ Basal Angiosperms
P ¥ A ¥ G ¥• spiralled tepals, not sealed carpels, 1 seeded follicles
Japanese anise
Schisandra
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Trimeniaceae: Trimenia with 5 spp. (Australasian trees, shrubs, vines)
‘ANA’ Basal Angiosperms
P ¥ A ¥ G 1• spiralled tepals; filamentous stamens; berry with one ovule
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Biogeographical distributions of the A A members of ANA support old notion that tropical Australasia was center of originof extant angiosperms
‘ANA’ Basal Angiosperms
Liberty Hyde Bailey
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‘ANA’ Basal AngiospermsNymphaeales: 2nd lineage after Amborella to diverge
• worldwide distribution except arid regions
• little biogeographic structureDistribution of Nymphaeaceae - water lilies
• water lilies and relatives
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• floating or submersed leaves
• air cavities in tissue
• mucilaginous coverings
• lack of vessels
‘ANA’ Basal Angiosperms*Nymphaeaceae – water lilies
8 genera with specialized ecological aquatic niche
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‘ANA’ Basal Angiosperms
Obvious ecological convergence in floating aquatics is the rule! Check out live aquatic plant display in Birge lobby.
Nuphar variegatum -yellow waterlily= basal angiosperm
Nymphoides peltata -water gentian= asterid dicot
*Nymphaeaceae – water lilies
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‘ANA’ Basal Angiosperms
Order Nymphaeales once included all these 3 genera
Nuphar Nelumbo
Ceratophyllumall are unrelated!
= ANA = eudicot
= basal angiosperm
*Nymphaeaceae – water lilies
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‘ANA’ Basal Angiosperms
Nymphaea odorata - water lily
CA 4-¥ CO ¥ A ¥ G (¥) • showy flowers with strong scent attracting animals• many parts at each whorl• laminar stamens
*Nymphaeaceae – water lilies
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‘ANA’ Basal Angiosperms
• showy flowers with strong scent attracting animals• many parts at each whorl• laminar stamens• superior, syncarpic pistil !
CA 4-¥ CO ¥ A ¥ G (¥)
*Nymphaeaceae – water lilies
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‘ANA’ Basal Angiosperms
Nuphar variegata -yellow pond lily • petaloid sepals, petals reduced
*Nymphaeaceae – water lilies
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‘ANA’ Basal AngiospermsAmazonian Victoria with peltate leaves
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‘ANA’ Basal AngiospermsCabombaceae - 2 genera often placed in Nymphaeaceae
Brasenia shreberi - water shield • small clonal floating aquatic• peltate leaves• wind pollinated
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‘ANA’ Basal AngiospermsCabombaceae - 2 genera often placed in Nymphaeaceae
Cabomba - fanwort • submersed and floating leaved• dimorphic leaves• insect pollinated
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‘ANA’ Basal AngiospermsMolecular phylogeny - secondary increase in floral structures
Don Les & al. 1999
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Magnoliid Basal AngiospermsRemainder of basal angiosperms (except monocots & hornwort)
• = Magnoliids (monophyletic)
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• tropical trees or paleoherbs (cordate leaves)
• aromatic - ethereal oils
Magnoliid Basal AngiospermsRemainder of basal angiosperms (except monocots & hornwort)
• tropical trees or paleoherbs (cordate leaves)
• aromatic - ethereal oils (“ranalian” smell)
• beetle or fly pollination common
• tropical trees or paleoherbs (cordate leaves)
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Magnoliid Basal Angiosperms*Magnoliaceae (Magnoliales)
• tropical or warm temperate trees or shrubs with large, pinnate netted, stipulate leaves• flowers large and solitary
Magnolia grandiflora
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Magnoliid Basal Angiosperms*Magnoliaceae (Magnoliales)
• perianth = tepals spirally arranged
P ¥ A ¥ G ¥
p
p
p
• androecium of laminar stamens
aaa
• gynoecium of many separate pistils or carpels
gg
g
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Magnoliid Basal Angiosperms*Magnoliaceae (Magnoliales)
• fruits of one flower = ‘cone’ or ‘aggregate’ of follicles
• dehiscent along one suture, derived from one carpel (leaf)
P ¥ A ¥ G ¥
Magnolia grandiflora
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Magnoliid Basal Angiosperms*Magnoliaceae (Magnoliales)
• fruits of one flower = ‘cone’ or ‘aggregate’ of follicles
• dehiscent along one suture, derived from one carpel (leaf)
P ¥ A ¥ G ¥
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Magnoliid Basal Angiosperms*Magnoliaceae (Magnoliales)
Liriodendron - tulip tree, yellow poplar - samara (winged) fruits
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Magnoliid Basal Angiosperms*Annonaceae (Magnoliales) - custard apples
• large, woody pantropical family
• perianth in 3 sets of three tepals
P 3+3+3 A ¥ G ¥
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Magnoliid Basal Angiosperms*Annonaceae (Magnoliales) - custard apples
• large, woody pantropical family
• perianth in 3 sets of three tepals
• fruits aromatic, aggregates of one carpeled berries
P 3+3+3 A ¥ G ¥
Annona
anon, cherimoya, custard-apple
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Magnoliid Basal Angiosperms*Annonaceae (Magnoliales) - custard apples
• Asimina triloba: paw-paw
• native to eastern North America
• flowers fly pollinated; fruits banana-like
P 3+3+3 A ¥ G ¥
Ohio paw-paw fair
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Magnoliid Basal AngiospermsMyristicaceae (Magnoliales) - nutmeg
• Myristica fragrans - nutmeg, mace• mace from aril• nutmeg from
seed
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Magnoliid Basal AngiospermsLauraceae (Laurales) - cinnamon, laurel
• aromatic trees or shrubs
• 3 merous flowers
P 3+3 A 3-¥ G 1
cinnamon
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Magnoliid Basal AngiospermsLauraceae (Laurales) - cinnamon, laurel
• aromatic trees or shrubs
• 3 merous flowers
P 3+3 A 3-¥ G 1
• fruit 1 seeded berry or drupe
avocado
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Magnoliid Basal AngiospermsPiperaceae (Piperales) - pepper, pepperomia
• herbs, vines, shrubs, epiphytes, cordate leaves, bi- or unisexual
P 0 A 3+3 G 1
PeperomiaPiper
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Magnoliid Basal Angiosperms*Aristolochiaceae (Piperales) - birthwort, wild ginger
• climbing or rhizomatous herbs, cordate leaves
• aromatic, medicinal compounds [“well born” family]
Aristolochia clematis
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Magnoliid Basal Angiosperms*Aristolochiaceae (Piperales) - birthwort, wild ginger
CA (3) CO 0 A 6-¥ G (4-6)• calyx corolloid
• petals absent
• fly pollination
• inferior, syncarpicA. hirta
hypanthium
A. lindneria
A. grandiflora
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Magnoliid Basal Angiosperms*Aristolochiaceae (Piperales) - birthwort, wild ginger
• Asarum canadensis -wild ginger
• creeping rhizome, paired leaves, flowers basal
• rhizome makes candied ginger
• North American Indians used for contraceptive
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Magnoliid Basal Angiosperms*Aristolochiaceae (Piperales) - birthwort, wild ginger
• 3 petals reduced to scales
CA (3) CO 0 A 6-¥ G (4-6)
![Page 51: Magnoliophyta - Angiosperms‘basal angiosperms’ - those groups that are now shown to be the first diverging – paraphyletic! We will look at the monocots - a ‘basal angiosperm](https://reader030.fdocuments.us/reader030/viewer/2022040602/5e975fa107e1532dbc398839/html5/thumbnails/51.jpg)
Magnoliid Basal Angiosperms*Aristolochiaceae (Piperales) - birthwort, wild ginger
• 3 petals reduced to scales
• seeds with arils, dispersed by ants
CA (3) CO 0 A 6-¥ G (4-6)