Plant Growth and Development (2)
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School
University of Guelph *
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Course
2470
Subject
Industrial Engineering
Date
Dec 6, 2023
Type
Pages
6
Uploaded by ProfWillpowerPartridge28
Plant Growth and Development
Lab 3 Worksheet (56 points total)
Due to CourseLink DropBox on the day of your session during the week of October 16th
Please note that lab assignments are due prior to the start of the lab.
Part 1: Answer the questions below to the best of your ability:
1.
In your observations of the monocot and dicot plants, what differences did you note
between the plant groups? Be as specific as possible and include photos with each
description that you record. (10 points)
While observing the
monocots and dicot plants,
one difference that was
easily notable between them
was leaf venetian. As seen
in the photos the soybean
plants had net like venation
throughout the leafs
whereas the corn had
parallel venation. Another
easily visible difference was
the flowering parts.
Monocot plants usually
grow and flower in
multiples of three whereas
dicots tend to flower in multiples of four or five. The root systems of these plants are vastly
different. The soybeans have a taproot
system with one dominant primary
root where the corn plant has a fibrous
root system emerging from the base of
the stem.
2.
For the plants that are available in two growth stages, record the following for each
age of plant: (10 points)
Plant 1:
Plant species:
Premature Corn
|
Corn
Age of plant:
September 22
|
September 15
Plant height (cm):
16.4cm |
18.2cm
Leaf width (at the widest part of the leaf) of each of the leaves:
1.1cm
|
1.2cm
Leaf length of each of the leaves:
7.7cm
|
8.1cm
Number of leaves:
4
|
5
Root length:
14.1cm
|
23.2cm
Plant 2:
Plant species:
Premature soybean
|
Soybean
Age of plant:
September 22
|
September 15
Plant height (cm):
13.4cm
|
15.8cm
Leaf width (at the widest part of the leaf) of each of the leaves:
4.8cm
|
6.3cm
Leaf length of each of the leaves:
5.7cm
|
6.3cm
Number of leaves:
5
|
5
Root length:
10.4cm
|
19.8cm
3.
Based on the information that you have collected and the age of the plants, what is
the growth rate of the plants? (5 points each – 10 points total)
Growth rate Plant height = H2-H1/T
-
Monocot:
18.2cm - 16.4cm / 22 - 15 =
0.257cm/day
-
Dicots:
15.8cm - 13.4cm / 22 - 15 =
0.343cm/day
Growth rate leaf area = LA2-LA1/T
-
Monocot
LA2 = 1.125 cm x 11.45 cm = 12.88 cm
(width avg: (1.2cm + 1.2 cm + 1.5 cm + 0.6 cm / 4) = 1.125 cm length avg: (5.4 cm +
13.2 cm + 19 cm + 8.2 cm / 4) = 11.45 cm
LA1 = 1.233 cm x 10.3 cm = 12.699 cm
(width avg: (1.3 cm + 1.2 cm + 1.2 cm / 3) = 1.233 cm length avg: (13.6 cm + 4.7 cm +
12.6 cm / 3) = 10.3 cm
12.88 cm - 12.699 cm / 7 days =
0.181 cm/day
-
Dicot
LA2 = 6.15 cm x 5.85 cm = 35.9775 cm
(width avg: (6.9 cm + 5.4 cm / 2) = 6.15 cm length avg: (5.5 cm + 6.2 cm / 2) = 5.85 cm)
LA1 = 2.55 cm x 3.4 cm = 8.67 cm
(width avg:(2.5 cm+2.6cm/2)=2.55cm length avg:(3.3cm+3.5cm/2)=3.4cm)
35.9775 cm - 8.67 cm / 7 days
= 3.901 cm/day
-
Compare the growth rate between the two plant species, and tell a little bit about
how each plant grows. (5 points)
Dicot plant height and leaf area grow at a quicker rate than those of monocots. Though the plant
height growth per day is within ~0.1cm, the leaf area growth for dicots is over 20 times faster
than monocot. Dicot plants appear to have rapid growth rates. Commonly, they can be seen
growing net-like patterns within their leaves. In terms of their root systems, dicot plants have a
primary root. Often, they undergo a second growth spurt, less rapid than the first, growing
smaller roots branching off of the primary root. This second growth spurt explains the rapid
growth they exhibit in early stages. Monocots tend to have steady growth. Similar to dicots, they
also grow root systems in which there are many roots for the one plant. However, there is no
primary root, and the root growth is experienced in one growth stage. Unlike net-like patterns,
monocot leaves grow parallel.
Part 2: Based on the lecture in lab, the reading material from the OCCA study guide, and any
additional sources of information, please answer the following questions to the best of your
ability:
1.
Using the information on the crop heat unit map of Ontario, a grower near Guelph
would select a corn cultivar requiring: (1 point)
a.
< 2400 CHU
b.
2600 CHU
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