TOPICS IN PLANT BIOLOGY
Essential Biology Learning Guides
link to "Special Attention to" review sheet for 9.1-9.4
Topic 9.1 Transport in the Xylem
Topic 9.2 Transport in the Phloem
Topic 9.3 Growth in Plants
Topic 9.4 Reproduction in Plants
Topic 9.2 Transport in the Phloem
Topic 9.3 Growth in Plants
Topic 9.4 Reproduction in Plants
Specific Unit Resources
Powerpoints (B Smullen/C Paine) for each topic: 9.1, 9.2, 9.3, 9.4
Allott & Mindorff reading: pp. 403-411 (9.1), pp. 412-421 (9.2), pp. 422-428 (9.3), pp. 429-436 (9.4).
Allott & Mindorff reading: pp. 403-411 (9.1), pp. 412-421 (9.2), pp. 422-428 (9.3), pp. 429-436 (9.4).
A point about food and plants...
See the recipe...
See the recipe with the plants highlighted...
Go to this fabulous IU lecture on Biology of Food...and scroll down to the section bold labelled "chloroplasts." This image is from a very nice animation for the parts of the potato plant. Check it out and feel free to get distracted by Jose Bonner's wonderful insight into the connections between food and the fundamentals of biology.
Root cross section
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Zoom in
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Shoot cross section
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Where do the axillary buds come from? What do they do?
As apical growth progresses in sections, a bit of inactive meristematic tissue is left behind at each "node" (end of a section).
When a side shoot or flower develops, the inhibition of cell division is removed and this meristem is activated.
Lateral Meristems - the label might be a bit more clear if it read that the cells in the lateral meristem can divide but only laterally, not along the axis of the stem. This will become important when we look at secondary xylem and phloem (below)
LATERAL (SECONDARY) GROWTH CAN BE TRICKY...TRY THIS SIMPLIFIED PLAN DIAGRAM AND THE FOLLOWING ANIMATION:
Function of various tissues in the leaf:
cuticle (wax) -
upper epidermis -
palisade mesophyll -
vascular bundles -
spongy mesophyll -
lower epidermis -
guard cells (around stomate) -
cuticle (wax) -
upper epidermis -
palisade mesophyll -
vascular bundles -
spongy mesophyll -
lower epidermis -
guard cells (around stomate) -
EXCELLENT ACTIVITY ON AUXINS AND TROPISMS...
HOW EXACTLY DOES AUXIN DO IT? IT'S IN THE GENES (AND IN THE WALL).
WHAT ABOUT WHEN THINGS GO WRONG? PLANT DEVELOPMENT MUTANTS:
Transport in Plants - Focus on the questions in EB92/PPT - note how this topic is an application of structure to ecology
A particularly unique adaptation to dry environments...CAM, Crassulacean Acid Metabolism.
PLANT REPRODUCTION
1. BE ABLE TO DISTINGUISH POLLINATION/FERTILIZATION/GERMINATION/SEED DISPERSAL
2. EXPLAIN (STEPS IN PROCESS) OF GERMINATION, ENVIRONMENTAL INFLUENCE/ADAPTATION
3. CONTROL OF FLOWERING BY PHYTOCHROME - REMEMBER, IT'S THE LENGTH OF THE NIGHT THAT MATTERS, NOT THE LENGTH OF THE DAY.
1. BE ABLE TO DISTINGUISH POLLINATION/FERTILIZATION/GERMINATION/SEED DISPERSAL
2. EXPLAIN (STEPS IN PROCESS) OF GERMINATION, ENVIRONMENTAL INFLUENCE/ADAPTATION
3. CONTROL OF FLOWERING BY PHYTOCHROME - REMEMBER, IT'S THE LENGTH OF THE NIGHT THAT MATTERS, NOT THE LENGTH OF THE DAY.
READY FOR FUN WITH PLANT (MOVIES) - TROPISMS?
Might not work in Chrome however...here's the link to copy if needed: http://plantsinmotion.bio.indiana.edu/plantmotion/starthere.html
And pollination - start at about 3:30...
And the diversity of flowering strategies - rivals the animal kingdom!
INTERESTING CONNECTION BETWEEN (CO)EVOLUTION AND PLANTS: