EMBRYOGENESIS IN PLANTS Flashcards

1
Q

types of plant propagation

A

asexual
sexual
artificial

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2
Q

testing the viability of the seed

A

seed scarification
scratching
rugdoll method

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3
Q

process of initiation and development of an embryo from a zygote or somatic cell

A

embryogenesis

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4
Q

types of embryogenesis

A

zygotic
somatic

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5
Q

the physical, observable transition from a nonembryogenic cell to an embryogenic cell in somatic embryogenesis appears to occur when the progenitor cell undergoes an unequal division, resulting in a larger vacuolate cell and a small, densely cytoplasmic cell

A

initiation of an embryonic cell

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6
Q

involved derivatives of both the basal and apical cells of the two-cell embryo

A

root apex

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7
Q

determined in an early globular stage before the cell cleavage that delineates the protoderm

A

shoot apex

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8
Q

during the transition from the globular to the heart stage are the first visible sign of the formation of the two embryonic organ systems

A

morphological changes

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9
Q

terminal event of embryogenesis

A

maturation

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10
Q

process of development of plant embryos, being either a sexual or asexual reproductive process that forms new plants

a process that occurs after fertilization of an ovule to produce a fully developed plant embryo

A

plant embryogenesis

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11
Q

embryogenesis may occur naturally in the plant as a result of sexual fertilization

A

zygotic embryo

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12
Q

plant cells can also be induced to form embryos in plant tissue culture

A

somatic embryos

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13
Q

an end stage embryo has five major components

A

shoot apical meristem
hypocotyl
root meristem
root cap
cotyledons

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14
Q

plants flower many times during their lifetime

A

polycarpic/iteroparous

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15
Q

characterized by a massive flowering episode which is followed by senescence and death

A

semelparous

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16
Q

the zygotic embryo is formed following double fertilization of the ovule, forming the plant embryo and the endosperm, which together go into the seed

A

zygotic embryogenesis

17
Q

seeds may develop without fertilization

A

apomixis

18
Q

process by which somatic cells or tissues develop into differentiated embryos

A

somatic embryogenesis

19
Q

stages of somatic embryogenesis

A

globular, heart, torpedo, cotyledonary

20
Q

embryos initiate directly from explants in the absence of callus formation

A

direct somatic embryogenesis

21
Q

callus from explants takes place from which embryos are developed

A

indirect somatic embryogenesis

22
Q

factors affecting somatic embryogenesis

A

genotype
explant
auxin
cytokinin
gibberellic acid
abscisic acid

23
Q

two phases of embryo development

A

morphogenesis
maturation