Germination and Seedling Growth of a Set of Rapeseed (Brassica napus) Varieties under Drought Stress Conditions

Germination and Seedling Growth of a Set of Rapeseed (Brassica napus) Varieties under Drought Stress Conditions



Souhail Channaoui, Rahal El Kahkahi, Jamal Charafi, Hamid Mazouz, Mohamed El Fechtali, Abdelghani Nabloussi



Drought stress is one of the major abiotic factors
affecting seed germination and plant growth especially in arid and
semi-arid regions. In this study, we investigated the effects of drought
stress on seed germination and seedling growth of five varieties of
rapeseed. Seven drought stress levels of zero (control), -3, -5, -7, -9,
-11 and -13 bars were performed using polyethylene glycol-6000
(PEG-6000). A completely randomized design with three replications was
used for this experiment. Germination percentage (GP), germination rate
(GR), mean germination time (MGT), root length (RL) and shoot length
(SL) were measured to evaluate the varieties response to PEG-induced
drought stress. Drought stress, variety and the interaction drought ×
variety had a significant effect on all studied parameters. GP and GR
decreased with the increase in stress level, while MGT increased. There
were no seeds germinated for all varieties at -11 bars and -13 bars.
Shoot length decreased with increasing drought stress but different
varieties show different performance under stress environment. Root
length decreased with increasing level of severe drought stress.
However, the presence of moderate drought stress could even improve the
root growth of the investigated varieties. The varieties ‘INRA-CZH2’ and
‘INRA-CZH3’ exhibited the highest germination percentage and the best
early seedling growth. Thus, they could be recommended for environments
with early cropping cycle drought. 



10.22161/ijeab/2.1.61



http://ijeab.com/upload_document/issue_files/61%20IJEAB-FEB-2017-23-Germination%20and%20Seedling%20Growth%20of%20a%20Set%20of.pdf



http://ijeab.com/submit-paper/

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