Term
| in what scenario is the dry mass of the plant often less than the original mass of the seed? why? |
|
Definition
dark grown seedlings
Carbon lost as CO2 - respiratory loss |
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Term
| where are apical meristems? what do they give rise to? |
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Definition
in root and shoot tips
-give rise to primary meristems |
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Term
| what are the primary meristems? |
|
Definition
protoderm
procambium
ground meristem |
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Term
| what are the secondary meristems? |
|
Definition
vascular cambium
cork cambium |
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Term
| what does the vascular cambium give rise to? the cork cambium? |
|
Definition
vc - secondary xylem and phloem
cc - bark |
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|
Term
| what does the procambium give rise to? |
|
Definition
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|
Term
| what does the protoderm give rise to? |
|
Definition
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|
Term
| what does ground meristem give rise to? |
|
Definition
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Term
| what is the diff. between determinate and indeterminate structures? |
|
Definition
determinate - grow to certain size, stop, senesce, die
indeterminate - vegetative, keep growing, become determinated when reproductive |
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Term
| what is a monocarpic plant? |
|
Definition
| one that flowers once and then dies |
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|
Term
| what is an example of a monocarpic perenniel? |
|
Definition
the century plant - vegetative for 10 years
- also bamboo |
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|
Term
| what is a polycarpic plant? |
|
Definition
| one that can return to vegetative state after reproductive mode |
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|
Term
| what is periclinal division? where seen?? |
|
Definition
new cell walls laid down parallel to surface?
fern spore |
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|
Term
| what is anticlinal division? |
|
Definition
| new cell wall laid down perpendicular to the nearest surface? |
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|
Term
| where is heart-shaped division seen? |
|
Definition
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|
Term
| where are cellulose microfibrils of primary wall arranged parallel to each other? |
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Definition
| where directional growth is observed (stems, roots, petioles) |
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|
Term
| what does isodiametric cell enlargement refer to? |
|
Definition
| ability to expand in all directions. microfibrils have random orientation |
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|
Term
| where is isodiametric cell division seen? |
|
Definition
| fleshy fruits and spongy mesophyll |
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|
Term
| what is the rate of cell enlargement proportional to? |
|
Definition
1. permeability of membrane to water
2. water potential gradient |
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Term
| what 2 factors affect how negative a plants water potential is (how willing to take up water)? |
|
Definition
1. solute potential
2. pressure potential |
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|
Term
| what are the 2 components to cell enlargement? |
|
Definition
plastic component - irreversible
elastic component - reversible |
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|
Term
| what hormone increases the extensibility of plant cell walls, promoting cell enlargement? |
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Definition
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