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Paper Information

Journal:   IRANIAN JOURNAL OF RANGELANDS AND FORESTS PLANT BREEDING AND GENETIC RESEARCH   SUMMER 2007 , Volume 15 , Number 2 (28); Page(s) 159 To 171.
 
Paper: 

EFFECTS OF SOME PLANT GROWTH REGULATORS ON PHYSIOLOGICAL QUALITY OF BROMUS AGED SEEDS

 
 
Author(s):  ISAVAND H.R.*, MADAH AREFI H.
 
* UNIVERSITY OF TEHRAN, DEPARTMENT OF AGRONOMY AND PLANT BREEDING
 
Abstract: 

The recovery of physiological quality of Bromus (Bromus inermis L.) aged seeds was evaluated, using cytokinin, auxin and gibberell in with 25, 50 and 100 ppm concentrations. Percentage of germination, rate of germination, length of radicle and plumule, seedling length and vigor index was decreased significantly by ageing. Auxin at 25 and 100 ppm increased germination percentage of aged seeds. All of plant growth regulators at same concentration showed different effects on germination percentage. Type of plant growth regulators had no significant effect on rate of germination, but increase in concentration of plant growth regulators, significantly decreased germination rate. Seed ageing inhibited growth of radicle more than plumula ones. Radicle seems to be one of susceptible structures to ageing in seed. Auxin some what recovered radicle growth of aged seed. Type of plant growth regulator did not affect radicle length, but plumule growth was promoted by cytokinin and gibberellin. In spit of decreasing Root/Shoot ratio in aged seeds, ageing had no significant effect on it, however, auxin increased this ratio in both aged and non-aged seeds. R/S decreased with increase in plant growth regulator concentration: Frequency of abnormal seed lings decreased by aging but dead seeds increased.

 
Keyword(s): SEED AGING, BROMUS INERMIS, PLANT GROWTH REGULATORS AND PHYSIOLOGICAL QUALITY
 
References: 
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