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. 1975 Aug;56(2):267–272. doi: 10.1104/pp.56.2.267

Gibberellin Response in Lettuce Hypocotyl Sections 1

Wendy Kuhn Silk a, Russell L Jones a
PMCID: PMC541802  PMID: 16659285

Abstract

Excised lettuce (Lactuca sativa L.) hypocotyl sections retain the ability to elongate in response to gibberellic acid (GA3) addition. In 48 hr at 30 C a GA3-treated segment more than doubles while a control segment elongates less than 50%. Auxin has no detectable effect on this system. Sensitivity to GA3 is not decreased by apex or root removal. Of the experimental variables tested, temperature, sucrose, and preincubation in water affect growth both with and without GA3. Blue and far red light inhibit growth without GA3; this inhibition is reversed by GA3. Potassium chloride stimulates growth of illuminated sections treated with GA3 but has no effect on control growth. When sections are incubated in the dark, KCl has a promotive effect on elongation.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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