تلخیص
The use of beneficial bacteria as agricultural inputs for increasing crop production needs the selection of competent rhizobacteria with plant growth promoting attributes. Nodulation in chickpea plants is inhibited due to higher levels of ethylene production in the rhizosphere under stress conditions. Rhizobacteria having trait ACCdeaminase can facilitate plant growth to over come these deleterious effects. For this, isolation of rhizobacteria containing ACC-deaminase from the rhizosphere of chickpea plants grown in different districts of Punjab, were screened for growth promotion of chickpea seedlings under axenic conditions. All the rhizobacterial isolates had the potential to change the growth of chickpea seedlings under axenic conditions except few isolates which showed negative effect on root and shoot growth of chickpea seedlings. Results of jar study exhibited that inoculation with selected isolates increased the root length, shoot length, dry root weight, dry shoot weight, lateral root number, lateral root length and lateral root dry weight of chickpea seedlings up to 107.5, 57.4, 86.7, 83.5, 266.7, 286.6 and 121 %, respectively, over uninoculated control. It is concluded that the presence of ACC-deaminase enzyme activity could be a useful tool for screening effective rhizobacteria to promote seedlings growth of chickpea under controlled conditions before testing their effectiveness under natural environment.
S.M. Shahzad1, A. Khalid2, M. Arshad1, Kalil-ur-Rehman. (2010) Screening rhizobacteria containing ACC-deaminase for growth promotion of chickpea seedlings under axenic conditions, The Journal Soil & Environment , Volume 29, Issue 1.
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