Growth of lentil, radicles under water and temperature stress
Review articleOpen access

AbstractLentil (Lens culinaris Medik. cv. Castellana) seeds were grown in water and PEG-4000 (polyethylene glycol, 7.5% w/v) at 23°C and in water under an alternating temperature regime (16 hr at 4°C and 8 hr at 23°C). Radicle growth in the presence of PEG or under alternating temperatures was lower than that of the control seedlings at 3, 4 and 5 days after soaking. The osmotic potential in cells grown in water and in PEG did not vary over the study period but was much lower in PEG than in control conditions. Under the alternating temperature regime the osmotic potential was initially higher but decreased to that of the controls. The cellulose content of the cell wall radicles was similar in all treatments on the third day of growth; later, the content decreased in the controls but did not vary in stressed radicles. The cell wall content in neutral non-cellulosic sugars was higher in stressed radicles than in the controls and in all cases decreased during the study period. Uronic acids and protein contents were higher in control radicles than in those subjected to stress, and the variations were similar in all cases throughout the study period; the amounts of uronic acids incressed but the protein content did not vary significantly. The most abundant neutral non-cellulosic sugars were arabinose and galactose, the contents of these being higher in the radicles that exhibited the least growth and their levels declined in all cases as growth progressed.

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