Boll Soc Ital Biol Sper
March 1977
The effect of interrupting darkness with red light in the presence or absence of 0.03% CO(2) was studied in relation to flowering of Xanthium pennsylvanicum and germination of light-sensitive lettuce seeds. The results indicate that CO(2) is essential for red light to be effective in either process.
View Article and Find Full Text PDFG Fis Sanit Prot Radiaz
June 1975
Ann Radiol Diagn (Bologna)
October 1966
Minerva Fisioter Radiobiol
November 1998