The regular phases of seed germination, stem and leaf growth ... detection of the elusive pigment phytochrome, whose action determines how plants are able to regulate their growth and development ...

This paper is part of a series dealing with the characterization of a type of regulatory photoreceptor molecule called phytochrome ... of developmental responses [to light]," including seed ...

Phytochrome functions at all stages of the plant's life ... Studies have shown that excluding light during tillage can reduce weed seed germination. Photocontrol has been accomplished by tilling at ...