Cryptochromes are blue light sensing photoreceptors involved in regulating various growth and developmental responses in plants. Using degenerate PCR, genome-walking and RT-PCR approaches, three full-length genomic sequences of cryptochrome genes (CRY1, 2 and 4) were isolated from the fern Asplenium
Pteridophytes that indicate environmental alteration in the San Jer6nimo Amanalco temperate forest, Texcoco, Mexico. The patterns of distribution of 26 pteridophyte species were studied as possible indicators of environmental alteration in the temperate forest of San Jer6nimo Amanalco, Texcoco,
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