THE INFLUENCE OF VIABILITY ON PHENOLIC CONTENT, CONDUCTIVITY AND SUGARS EFFLUX, AND THE RELATIONSHIPS BETWEEN THESE INDICES IN WHEAT SEEDS

Abstract

The influence of wheat seeds viability on phenolic content, conductivity and sugars efflux as well as the relationships between these physiological and biochemical indices was the purpose of this paper. The biological material, supplied by Suceava Agricultural Research and Development Station, was represented by six different seed samples of wheat (Triticum aestivum L. spp. aestivum) belonging to a local cultivar, kept different periods in uncontrolled storage conditions. It has determined: seeds viability  (germination  capacity  %)  as  well  as  conductivity,  transmembrane  sugars  effllux,  Total Phenolic Content (TPC) before germination and TPC post germination, evaluating the relationships between these indices, too. Both before and post germination, the seed samples with higher viability have  recorded  higher  total  phenolic  content  values,  compared  to  samples  with  low  viability.  The germination process has increased the total phenolic content values with much higher percentages in samples with risen viability. The correlations between viability and total phenolic content, determined before and post germination, have shown positive correlations significant for relationship Viability - TPC  post  germination.  Regarding  the  seminal  exudate,  the conductivity  values  have  fluctuated,  the highest  value  being  in  seed  sample  with  lowest  viability.  The sugars  efflux  have  steadily  registered increasing  values  once  with  seed  viability  decreasing.  The  correlation  between  viability  and conductivity, as well as between viability and transmembrane sugars efflux in the six wheat samples, have shown negative correlations, significant for relationship viability - sugars efflux.