Photoperiodic Sensitivity of Pharbitis Nil Seedlings of Different Ages in Special Reference to Growth Patterns
Year: 1963
Type: article
Abstract: Changes of growth patterns with age in Pharbitis seedlings have been investigated in relation to the appearance of photoperiodic sensitivity.1. Dark-grown seedlings become sensitive to a single inductive dark period a definite number of hours after transfer to light, and the light period required to obtain this photoperiodic sensitivity decreases with an increasing duration of the growth of the seedling in the dark at the beginning of germination.2. The appearance of the photoperiodic sensitivity coincides in time with a change in the dry weight of the cotyledons and with tissue differentiation in them. At this time the dry weight ceases to decrease and begins to increase. In the stage at which the growth of hypocotyl ceases and that of the plumules becomes predominant the plant attains photoperiodic sensitivity.
Source: Shokubutsugaku Zasshi
Authors: Keiji MARUSHIGE, Yasuko MARUSHIGE
Institution: Kyoto University
Language: English
Topic: Light effects on plants
Subfield: Plant Science
Domain: Life Sciences
Open Access status: bronze
OpenAlex ID: W2327997678