Paper Information

Journal:   JOURNAL OF AGRICULTURAL SCIENCES   2006 , Volume 12 , Number 1 (SUPPLEMENT); Page(s) 17 To 30.
 
Paper:  INVESTIGATION OF DROUGHT TOLERANCE OF TEN PEA GENOTYPES IN SEEDLING STAGE USING POLYETHYLENE GLYCOL 6000
 
Author(s):  MARJANI A., FARSI M., RAHIMIZADEH M.
 
* 
 
Abstract: 

Seed germination is one of important stages of growth which is a basic requirement for determining optimum plant density in farm. This character is affected by many biotic and abiotic factors including ability of genotypes to tolerate water stress imposed by environmental factors. The objective of this research was to investigate reaction of ten rainfed pea genotypes including seven natives and three improved ones to water stress at seed germination and to determine parameters and an appropriate water potential for screening tolerant genotypes. Experiment conducted as a split plot in a complete block randomized layout with four replications. Main treatments were five water potentials using PEG 6000 and sub-treatments were ten lines including seven natives (MCC13, MCC28, MCC37, MCC44, MCC235, MCC259, MCC258) and three improved ones (FLIP84-480, ILC482. ILC533). Seeds were placed on watman papers in petri dishes in a germinator at 21±1oC. After five and eight days germinated seeds were counted, rate of germination, length of radicle and coleoptyle were measured. Results indicated that with reduction of water potential from zero to-12 bar, seed emergece percentage, at both five and eight days after soaking, and length of coleoptile and radicle root significantly reduced. The reduction in all traits was maximum at changing water potential from zero to-3 bar. The highest differences among genotypes were observed at-6 bar. Among the ten genotypes, ILC533 had a considerable germination at-9 and-12 bar. Length of radicle was the most adverced affected trait from water stress, nevertheless length of radicle was a better parameter in screening genotype for drough tolerance. The best level of water potential for screening genotypes was found to be-6 bar.

 
Keyword(s): RAINFED PEA, GERMINATION, POLYETHYLENE GLYCOL (PEG), DROUGHT STRESS
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 41
 
Latest on Blog
Enter SID Blog