Laboratory Practice

Effect of chemical contaminants on the germination of seeds

Effect of chemical contaminants on the germination of seeds

• Material

• Petri plates• Sal• vinegar• then d'avet• test• dropper

Effect of chemical contaminants on the germination of seeds

• Procedure:

1. We will germinate in petri dishes d'anet then irrigated with water and mineral water with different concentrations of salt or vinegar.

Effect of chemical contaminants on the germination of seeds

• 2. Steps • Each capsule stuck a label with the name of

the group of students, and a number. each capsule will put blotter at the base, two layers thick.

• 5 d'anet will then spread around each capsule.

Effect of chemical contaminants on the germination of seeds

• Will 3 ml of liquid water in each capsule as follows:• Regain 1 capsule with water, watered water• Regain 2 capsule with water contaminated salt 1g /

ml contaminated water and vinegar watered to 50%• 3 capsule will water contaminated with salt water to

2g / ml contaminated water and vinegar watered to 75%

• Capsule 4 watered salt contaminated water to 3.5 g / ml and vinegar watered pure 100%

Effect of chemical contaminants on the germination of seeds

• Save capsules protected from light, separating two different drawers that contain salt that contain vinegar.

• Very important: will be watering at least 2 times per week using the dissolution if the paper is dry, so that the paper remains moist but not fully floating water. Also will be observing and then scored on a grill amount of seeds that have germinated.

Effect of chemical contaminants on the germination of seeds

• Questions and Comments:• Data collection:• Should be performed every Monday,

Wednesday and Friday for the duration of practice: six observations following the registration form:

Effect of chemical contaminants on the germination of seeds

Salt Day 1 Day 2 Day 3 Day 4 Day 5 Day 6

Capsule 1

Capsule 2

Capsule3

Capsule 4

Effect of chemical contaminants on the germination of seeds

Vinegar Day 1 Day 2 Day 3 Day 4 Day 5 Day 6

Capsule 1

Capsule 2

Capsule3

Capsule 4

Effect of chemical contaminants on the germination of seeds

• At the end of the observations we di the analysis of the data.

• Ratings

Effect of chemical contaminants on the germination of seeds

Effect of chemical contaminants on the germination of seeds

Effect of chemical contaminants on the germination of seeds

Effect of chemical contaminants on the germination of seeds

Effect of chemical contaminants on the germination of seeds