Plant Vascular SystemPlant Vascular Systemandand

TranspirationTranspiration

Plant Vascular SystemPlant Vascular System

Plant Vascular System FunctionPlant Vascular System Function

The plant vascular system The plant vascular system takes water and nutrients takes water and nutrients from the ground, through from the ground, through the root system, and up the root system, and up into the leaves, flower into the leaves, flower petals and fruits.petals and fruits.

Xylem – vascular tissue in plants that carries water upward from the roots to every part of a plant. The presence of xylem allows a gardener to only have to water the soil around a plant, not the actual plant leaves.

Plant Vascular System

Since Xylem carries water, water flow can act as a skeletal system providing the plant support

Plant Vascular SystemPlant Vascular System Phloem-Phloem- Phloem has a Phloem has a

similar function to the xylem, similar function to the xylem, except that phloem moves except that phloem moves nutrients throughout the plant nutrients throughout the plant instead of water. instead of water.

Transports carbohydrates Transports carbohydrates made during photosynthesis.made during photosynthesis.

Nutrients required by plantsNutrients required by plants MacronutrientsMacronutrients

Nitrogen, Phosphorus, Nitrogen, Phosphorus, PotassiumPotassium

MicronutrientsMicronutrients ChlorineChlorine IronIron ManganeseManganese

Transpiration

Transpiration

1. water enters the root.2. moves up the vascular tissue (xylem).3. enters the leaves. 4. exits the leaves by way of the stomata.5. evaporates into the

atmosphere.

Transpiration – loss of water from a plant through it’s leaves.

The movement is caused by the combination of root pressure and capillary action which provides enough force to move water through the xylem tissue of even the tallest plant.

Transpiration

Roots are responsible to bringing the water into the plant.

Transpiration

Because roots grow in soil, scientists must find unique methods to study them. This clover root is growing in agar so it can be

observed.

Transpiration

Stoma (stomata) – opening in the underside of a leaf that allows CO2 and O2 to diffuse into and out of the leaf.

TranspirationVocabulary

Guard Cells - cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata. (Remember hypotonic and hypertonic vocab.)

TranspirationVocabulary

Stomatal Closing1. Potassium ions move out of the vacuole

and out of the cells. 2. Water moves out of the vacuoles,

following the potassium ions.3. The guard cells shrink in size.4. The stoma closes.Stomatal opening1. Potassium ions move into the vacuoles.2. Water moves into the vacuoles, following

potassium ions.3. The guard cells expand.4. The stoma opens.

Transpiration

True or False??

Animals respire, plants do not.

Transpiration

False!

Plants have mitochondria too. Plants take in H2O from the roots and CO2 from the leaves to make O2. The mitochondria in the plant then converts the O2 and C6H12O6 into the energy (ATPs) the plant needs in order to grow and perform biological processes.

Transpiration

Pearson Lab Bench Activityhttp://www.phschool.com/science/biology_place/labbench/lab9/intro.html

Videoshttp://www.youtube.com/watch?

v=tRNe_UHw7F4&feature=related

http://www.youtube.com/watch?v=mc9gUm1mMzc

Informative video:http://www.youtube.com/watch?v=fNtFwQ4NpDg