SRP (ncert Only) Flashcards
Ex. Of Multicarpellary syncarpous gynoecium
In Papaver
Ex. Of multicarpellary apocarpous gynoecium
In Michelia
Pollen allergy is caused by
Parthenium aka carrot grass
Came to India as contaminant with imported wheat.
Period for which pollen grains remain viable depends on
Prevailing temperature
Humidity
Viability period of pollen grains in rice & wheat is
30 minutes
Pollen viability is for months , in
Rosacea
Leguminoseae/fabacea (earlier c/d papileonoidae)
Solanaceae
Egs of plant having 1 ovule in ovary
Wheat
Paddy
Mango
Example of plants having more than 1 ovule in a ovary
Papaya
Watermelon
Orchids
Egg apparatus =
2 synergids & 1 egg cell at micropylar end.
Plants that produce both cleistogamous as well as chasmogamous flowers are
Commelina
Oxalis
Viola (common pansy)
COV
Autogamy occurs in
Commelina
Oxalis
Viola (common pansy)
Geitonogamy is seen in
Maize
Castor
Xenogamy is seen in
Papaya.
______ is functioning cross-pollination but genetically similar to autogamy.
Geitonogamy
_____ is the only type of pollination that brings genetically different types of pollen grains.
Xenogammy
____ flowers are invariably autogamous (no chance of cross-pollination).
Cleistogamous
Characteristics of plants that show Pollination by wind
Light & non-sticky pollen grains Well exposed stamens Large & feathery stigma Often single ovule in ovary Numerous flowers packed into an inflorescence
Corn cab shows pollination by
Wind
Pollination by water is quite rare, limited to only 30 genera, mostly monocots.
T/F
True .
Though its common in lower grps like algae, bryophytes & pteridophyte.
Examples of water pollinated fresh water plants
Vallisneria
Hydrilla
Example of water pollinated marine plants
Zostera ( a marine sea grass)
In majority of aquatic plants like water hyacinth & water lily pollination occurs by
Insects or wind.
In ________ , male flowers reach surface & release pollen grains onto the surface.
In _______, male flowers remain submerged & p/gs are released inside water.
Vellisneria = onto the surface Zostera = inside the surface
___&___ are usual floral rewards for pollinators.
Nectar
Pollen grains
Common insect pollinators are
Bats Bees Butterflies Flies Wasps Ants Moths Birds ( hummingbird & sunbirds )
Flowers pollinated by ___&____ secrete foul odour to attract animals.
Flies & beetles.
Primate like lemur
Reptile like gecko lizard & garden lizard
Aboreal (tree dwelling) rodents
Are also pollinators.
T/F
True.
Tallest flower is
Amorphophallous ( 6 feet tall)
Examples of plant where Reward of pollination is providing safe places to pollinators .
Amorphophallous
Species of moth & yucca
Castor & maize are
Monoecious plants (bisexual)
Papaya is
Dioecious plant
Outbreeding devices include
Asynchronous pollen release & stigma receptivity.
Different positions of anther & stigma
Self-incompatibility
Production of unisexual flowers
Porogamy is
Entry if pollen tube through micropylar end.
Events from pollen deposition to entry of pollen tube are together referred as
Pollen-pistil interaction
No need of emasculation in
Wheat.
If parent plant produces unisexual flowers.
Central cell after triple fusion becomes
PEC (prima endosperm cell) & develops into endosperm while zygote develops into an embryo.
Coconut water is
Free nuclear endosperm (m/o 1000’s of nuclei)
Kernel of coconut is
Cellular endosperm
Endosperm is completely consumed by developing embryo in
Pea
Groundnut
Beans
Aka exalbuminous seeds
Aka non-albuminous seeds
Persistent endosperm is found in
Castor
Coconut
Albuminous seeds
Cotyledon in grass family is k/a
Scutellum
Embryo of monocots mei scutellum is Situated twrds one side (lateral) of embryonal axis
Remains of 2nd cotyledon occur in some grasses c/d
Epiblast
Oldest viable seed is of
Lupine ( Lupinus arcticus) excavated from arctic tundra. Seed germinated & flowered after an estimated record of “10K yrs “ of dormancy.
2000 yr old yet viable seed is of
Date palm (phoenix dactylifera)
Discovered during archeological excavation at King Herod’s palace
Examples of Large no. Of seeds in a fruit
Orchid fruits
Some parasitic species like Orobanche & striga
Fleshy fruits examples
Guava
Orange
Mango
False fruits
Apple
Strawberry
Cashew
Dry fruits
Groundnut
Mustard
Persistent nucellus is called
Perisperm
Perisperm exists in
Black pepper & beet
Polyembryony is common in
Many citrus & mango
Fruit production without fertilisation is called
Parthenocarpy.
Ex. Banana
Seed production without fertilisation is called
Apomixis
