impact of water deficit and nematode infection on growth...
TRANSCRIPT
Impact of Water Deficit and Nematode infection on Growth
and Physiological Responses of Mungbean (Vigna radiata L.)
Areej A. Alzarqaa, Shahira S. Roushdy, Ali A. Alderfasi,
Fahad A. AL-Yahya and Ahmed A. Dawabah
Sustainable Irrigation 2014
Thursday 19 June
Ali Alderfasi
King Saud University
Introduction
Water scarcity is being increasingly accepted as a major limitation for increased agricultural production and food security in the 21 st
century.
Water on a global scale is plentiful but 97 % is saline and 2.25 % is trapped in glaciers and ice, leaving only 0.75 % available in fresh water .
Drought and Disease(abiotic & biotic) stresses are global problem reducing plant growth and productivity worldwide.
Sustainable agricultural development, in arid and semi-arid regions is influenced to a great extent by available water and free of attacked of disease that might help effectively in developing agriculture.
Mungbean is a summer legume crop that has short- growth season and nitrogen fixation capability, also it was found as a drought resistance (Subtitute to Alfaalfa and barely froge).
Ali Alderfasi
King Saud University
To solve problem of drought , some strategies have been used:
1. Selecting drought-tolerant genotypes
2. Improving water use efficiency in plants.
3. Using suitable irrigation scheduling methods providing plants with enough water requirements.
4. Using municipal wastewater treatment plant.
5. Using some alternative crops such as a triticale complement of wheat.
6. Imported new genotypes have short growing season and drought resistance.(my presentation today will be on this topic).
Ali AlderfasiKing Saud University
Research Group Goals
Thus, the present study was proposed
to clarification of the strategy #6 and
to study the Physiological responses
of mungbean (Vigna radiate) to water
deficit and Nematode infection stress (This work is a part of master thesis of graduate student Areej Alzarqaa).
Ali AlderfasiKing Saud University
The Main Objective
How To Handel The Problem
Ali AlderfasiKing Saud University
● Plant Materials
Two genotypes of mungbean; Kawmay -1 and VC-2010 were tested in pots experiment.
● Drought Stress Induction
Three irrigation levels (20%, 40% and 80%) based on field capacity were used.
● Root-Knot Nematode Inoculum
After four weeks from sowing, half of the pots were inoculated with root-knot nematode @15000 egg/pot while other half was kept non- inoculated as control.
Ali Alderfasi King Saud University
● Experimental Design
The experiment has 12 treatments with 3 replicates (2x3x2x3), 36 experimental units
● Statistical analysis
Data were statistically analyzed according to the methods
described by Gomez and Gomez [1984]. The means were
compared using the least significant difference LSD.
RESULTS
Ali Alderfasi King Saud University
Ali Alderfasi King Saud University
0
5
10
15
20
25
30
35
40
45
50
80%
40%
20%
Kamway-1 VC-2010
Plant leaf area (cm2/plant) as affected by water deficit and Nematode infection
Noninfected Infected Noninfected Infected
Ali Alderfasi King Saud University
0
10
20
30
40
50
60
70
80
90
80%
40%
20%
Kamway-1 VC-2010
Stomata conductance (µmol/m2/s) as affected by water deficit and Nematode infection
Shoot water content (%) as affected by water deficit and nematode infection
69
70
71
72
73
74
75
76
77
80%
40%
20%
Kawmay-1 VC-2010
Shoot dry weight (g) as affected by water deficit and nematode infection
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
80%
40%
20%
VC-2010Kawmay-1
Leaf chlorophyll (a) content as affected by water deficit and Nematode infection
100
400
700
1000
1300
1600
1900
2200
2500
Chlorophyll a (µg/g)
80%
40%
20%
Noninfected Infected Noninfected Infected
Kawmay-1 VC2010
Ali Alderfasi King Saud University
20
120
220
320
420
520
Chlorophyll b (µg/g)
80%
40%
20%
VC-2010
Noninfected Infected Noninfected Infected
Kawmay-1
Leaf chlorophyll (b) content as affected by water deficit and Nematode infection
100
150
200
250
300
350
400
450
80 40 2080 40 20
Water capacity %
Non-infected
Infected
Vc-2010Kawmy1
Leaf proline content (mg/100g) as affected by water deficit and Nematode infection
Leaf protein content as affected by water deficit and Nematode
infection
ACKNOWLEDGMENT
THE CONFERENCE SECRETARIAT
Belinda Lopez
SPONSORSWIT Transactions on Ecology and the Environment and International Journal of Sustainable Development and
Planning
ORGANIZERS
Wessex Institute of Technology - UK , University of Lethbridge, Canada and University of South Australlia, Australlia
I would like to thank king Saud University for given me this opportunity to attend this conference and my thanks extend to:
Ali Alderfasi King Saud University
My pleasure to answer your questions