1512646
Description
Flashcards by beccataylor101, updated more than 1 year ago
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Created by beccataylor101
over 10 years ago
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| Question | Answer |
| Tap roots that swell with water or carbohydrates perform storage functions for survival in the dessert | -Beets -Carrots -Parsnips -Cassava -Yams |
| Roots Hairs | Single cell projections from the epidermis of a young root |
| What do roots do when they die | Add organic matter to the soil |
| How do roots differ from stems | Roots do not have nodes from which shoots develop (exception of suckering roots in popular trees and thistles) |
| What kind of tissue is the Root Cap made of? | Parenchyma tissue- it is continually replaced as the root tip is pushed through soil |
| Does Root look for water? | No, roots are pushed down by gravity and sets it in a position of finding higher soil moisture. |
| What does the Apical Meristem do and where is it located? | It supplies root cap with more cells with more cells as they are lost, it is located above the Root cap and below the region of elongation. |
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Image:
IMG_0544.PNG (image/PNG)
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a- region of maturation b- secondary root branches c- root hairs (absobtion of water) d- apical meristem e- root cap f- region of elongation |
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Image:
IMG_0545.PNG (image/PNG)
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a- epidermis b-cortex c-pericycle d-xylem e-endodermis f-vascular cambium g-phloem |
| Four main Root Structures | Maturation Apical Elongation Root Cap |
| What does it mean when you see Root hairs | That the plant has differentiated enough to actively take in water and minerals |
| Where do root hairs begin growth | From the epidermal cells |
| Where is water stored | In the cortex of parenchyma cells |
| Where do lateral roots grow from? | Exterior layer of stele called pericycle |
| What do monocot roots not have that a dicot root has? | A vascular cambium |
| What region of root is constantly moving | Elongation Region |
| Why are there no root hairs on elongation region | because of the movement of the part of the root |
| How much of a large plant is underground? | 1/3 to 1/2 |
| What part of the root grows in diameter? | Mature region |
| What is Guttation | when there are small droplets of water on tips of young leaves, this means that the plant has a healthy root system. |
| What happens in the dissuasion of water intake | Water and ions move freely along cell walls and intercellular air space in cortex |
| What is suberin | A waxy like compound that tightly packs endodermis cells on the top, bottom and side walls |
| where does a apoplectic pathway go | through the cell wall |
| Where does symplastic pathway go? | Through the cytoplasm |
| What are the 18 essential elements of plants? | 1)Boron 2)Carbon 3)Chlorine 4)Calcium 5)Cobalt 6)Copper 7)Hydrogen 8)Iron 9)Magnesium 10)Maganese 11)Molybdenum 12)Nitrogen 13)Oxygen 14)Potassium 15)Phosphorus 16)Sodium 17)Sulfur 18)Zinc |
| What are the Organic Nutirents | Oxygen Hydrogen Carbon |
| What are the Primary Macro-Nutirents? | Nitrogen Phosphorus Potassium |
| What are the Secondary Macro Nutrients | Sulphur Magnesium Calcium |
| Which nutrient builds protein, nucleic acid and chlorophyll | Nitrogen |
| How can you tell if a plant is lacking Nitrogen | Yellowing of lower leaves |
| What nutrient promotes root growth and hastens maturity? | Phosphorus |
| How can you tell if a plant is lacking Phosphorus? | Lower leaves turning a dark green to purplish colour |
| What does potassium do for the plant? | Improves stalk strength and creates diease resistance and vigour |
| How can you tell if a plant is lacking potassium? | Mottled chlorosis of lower leaves and browning of leaf tips |
| What nutrient enhances seed formation in Brassicacease and nodule formation in legumes? | Sulphur |
| How can you tell is a plant is lacking Sulphur | Interveinal chlorosis in younger leaves |
| What does calcium do for the plant? | Enhances root hair formation, growth and fruit development Forms structural component of middle lamella |
| How can you tell if a plant is lacking calcium? | Necrossi of younger leaf margins and apical meristems |
| How can you tell if a plant is lacking Magnesium? | Reddish- purple streaks form in the older leaves |
| What does magnesium do for a plant? | Involved in starch translocation, fat and oil formation and aids ribosomes in protein synthesis |
| What does endodermis do for the root? | Set of permeable membranes that selectively take minerals and water and move them to the stele |
| What region of root would most active absorption of minerals occur? | Mature region, where endodermis has fully matured |
| Why are the secondary macronutirents called this? | Because they are taken up in fairly large amounts, but not as much as primary nutrients |
| How much water is needed in soil before roots can take in moisture | 30% by volume |
| Roots grow better in cooler temperatures, around what temperature? | 10 degree celcius |
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