Interactions of Light and a Temperature Shift on Seed Germination | Zendy

R. B. Taylorson | Zendy; S. B. Hendricks | Zendy

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Interactions of Light and a Temperature Shift on Seed Germination

Author(s) -

R. B. Taylorson,

S. B. Hendricks

Publication year - 1972

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.49.2.127

Subject(s) - germination , phytochrome , cycloheximide , botany , chemistry , horticulture , biology , red light , biochemistry , protein biosynthesis

Germination of Rumex obtusifolius L. seeds is potentiated to an observable degree in 2 minutes by a single shift in temperature from 20 to 35 C. Half-maximal potentiation requires less than 32 minutes at the higher temperature. Similar sensitivities to shifts in temperature were observed for seeds of Barbarea vulgaris, R.Br. B. verna (Mill.) Asch., and Lepidium virginicum L. A shift in temperature interacts strongly with change in form of phytochrome induced by light on germination of the four kinds of seeds. The potentiated effects for R. obtusifolius are only moderately affected by 40 mum cycloheximide. Both the temperature shift and light actions are apparently independent of processes of synthesis necessary for growth.

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