Improvement of drought tolerance of Vigna radiata L. R. Wilczek by low doses of water extract of Sorghum bicolor L.(Moench)‎

Other Title(s)

تحسين تحمل الجفاف لنبات ألماش باستخدام جرع منخفضة من المستخلص المائي للذرة البيضاء

Dissertant

al-Husayni, Muna Khalaf Jasim

Thesis advisor

al-Sadawi, Ibrahim Shaban

Comitee Members

al-Shahwany, Ayyad W.
Shahid, Abd Allah Ibrahim
al-Musawi, Ali H.

University

University of Baghdad

Faculty

College of Science

Department

Department of Biology

University Country

Iraq

Degree

Master

Degree Date

2013

English Abstract

There is a growing evidence that the lower concentration of allelopathic compound or extract of allelopathic crop have the ability to improve the resistance to abiotic stress.

Field trial was conducted in Research Field equipped with rain fall transparent shade, Biology of Department, College of Science, University of Baghdad during the growing season of 2012 to test the potential of sorghum water extract in improving yield and yield components of local cultivar of mung bean crop grown under different moisture deficit stresses.

The water stresses were applied by irrigated the plots to field capacity and withheld the next irrigation until the soil water deficit reaches 20 , 50 and 75% of field capacity for control, mild water stress and higher water stress, respectively.

Foliar application of sorghum water extract at 0 ( control), 2.5 and 5% (W/V) was made at preflowering, flowering and fruiting stages.

The experiment was conducted in split plot design with four replications for each treatment.

The sorghum water extract rates were kept in the sub plot while moisture deficits were assigned as main plot.

Results showed that drought stress significantly reduced the averages seed yield , dry matter accumulation, number of pods per plant, number of seeds per pod and plant height.

Foliar applications of sorghum extracts significantly increased seeds yield, dry weight biomass, number of seeds per pod and plant height.

The interaction of drought stress and sorghum water extract treatment significantly affected seed yield , dry matter accumulation, number of pods per plant, total chlorophyll content and plant height.

Application of sorghum water extract under sever moisture deficit stress (i.e., 70% field capacity) increased seed yield, dry weight biomass and plant height , number of pods per plant, number of seeds per pod by 37.8%, 48.9%,64.3% and 8.7%of control, respectively compared to the reduction achieved by the sever moisture deficit applied alone which was59.6% , 92.1% , 30% ,and 48.2% of control for the aforementioned parameters respectively.

Chlorophyll content was found to be increased by application of sorghum extracts.

Proline content of leaves was significantly increased by high drought stress.

However, such differences were disappeared when sorghum extract was applied, suggesting another mechanisms could be responsible for the stimulatory effect of sorghum extract under drought stress.

In conclusion, foliar applied sorghum shoot extract could be used for mitigation of drought-induced adverse effects on growth and productivity of mung bean

Main Subjects

Biology

No. of Pages

50

Table of Contents

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• MLA
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Language

English

Data Type

Arab Theses

Record ID

BIM-598033