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Plants Have one big disadvantage. THEY CAN’T MOVE!

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Presentation on theme: "Plants Have one big disadvantage. THEY CAN’T MOVE!"— Presentation transcript:

1 Plants Have one big disadvantage. THEY CAN’T MOVE!

2 So they must be much smarter than animals to defend themselves. They are! To see them in action, you must speed up the time.

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4 Clips shown earlier is from “Planet Erath” series produced by BBC. One special shot is my favorite

5 5 CD collection is the prize for question of the week.

6 More time-lapsed movie of plants

7 How do they procreate? Seeds and pollen are the most common method. Both depend on cooperation of wind or other animals (mostly birds or insects)

8 A few strange ways seeds are dispersed.

9 A murderous tree!

10 A few interesting plants..

11 The spindly orange vine known as dodder is a parasitic plant. Time-lapse video reveals that a dodder seedling twirls through the air, sniffing volatile chemicals released by neighboring plants in search of a suitable host. When it finds one, dodder entwines its victim and inserts nozzles into the host's stem, siphoning of vital nutrients.

12 Venus flytrap and Mimosa pudica You don’t need time lapsed photography to see them move.

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14 Recommended: 2833 Old Gravenstein Highway South Sebastopol, California 95472

15 Alpine buttercups are known for their solar tracking abilities – their small yellow flowers follow the sun's daily journey from east to west. Researchers think that the behavior helps keep the flowers warm, which boosts chances of pollination by heat-seeking insects. Scientists have shown that the buttercup responds specifically to the blue wavelengths of sunlight.

16 A small Asian shrub named the telegraph plant tracks the sun - not with its blooms, but with its leaves. Small leaflets attached to the base of larger leaves constantly swivel to monitor changing levels of sunlight, adjusting the position of the primary leaves as needed. The leaves move so quickly you can see them dance with the naked eye.

17 Irises bloom in the spring and early summer. They know that the time for flowering has arrived because they can sense that the days are getting longer and the nights are getting shorter.

18 The wild cucumber's spidering tendrils, which grab onto fences and other plants for support, are super-sensers. Most people cannot feel the weight of a string weighing less than 0.07 ounces. But the tendrils of the wild cucumber respond to the touch of a string weighing only 0.009 ounces and immediately start twirling around the tiny thread.

19 In lab experiments, researchers have shown that a weedy beach plant known as sea rocket recognizes its siblings and restrains its root growth in their presence.

20 Contnued.. When planted near strangers, however, sea rocket grows as many roots as possible, since there is no benefit to helping out an unrelated plant. Sea rocket probably identifies family based on chemicals that roots secrete into the soil

21 Common bread wheat, also known as “winter wheat," only flowers and makes grain following a cold winter. If winter snows do not blanket the sprouts, they never flower.

22 Continued.. But if prior to planting, farmers keep the seeds in the freezer for a while, then the sprouts will flower even in the absence of snow. In other words, the plants remember their exposure to the cold. Slides from: http://www.scientificamerican.com/slideshow.cfm?id=what-plants- smell-plant-unusal-talents#1

23 The largest flower. Rafflesia arnoldii or "corpse flower".


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