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ffects of Temperature and Length of Day on the Sex Expression of Monoecious and Dioecious Angiosperms
R. G. THOMAS
Department of Botany, University College, Nuffield Botanical Research Garden, Nuffield Lodge, London, N.W.1. April 12.
IT has been demonstrated1 that production of female flowers in Cucurbita pepo is delayed when plants are grown in high temperatures and during long photoperiods. Previous investigations indicated a similar effect of temperature and length of day on the sex of Ambrosia
Stress related sex problems may produce
hermaphrodite plants. The stress of what is
sometimes called "early flowering" (it is not
really early flowering, there is no such thing
as early flowering. We will explain this in a
moment) triggers the plant into a situation
where it thinks that its chances of
reproduction are slim to none. That situation
is a condition called - 'self-pollination'. It
does this by producing both male and female
flowers on the same plant. The male flowers
then pollinate the female flowers which will
eventually produce seeds. The reason for this
is that the plant notices that the photoperiod
is irregular and that it should no longer be in
the vegetative cycle but in flowering. This
shocks the plant into a last ditch effort to
receive pollen because it feels that it has
missed its chance to receive pollen already (in
the wild males release their pollen just around
the time that females begin to flower and
sometimes even before that).
.dmt-nexus.me/Files/Books/General/Cannabis20Grow%20Bible.pdf
R. G. THOMAS
Department of Botany, University College, Nuffield Botanical Research Garden, Nuffield Lodge, London, N.W.1. April 12.
IT has been demonstrated1 that production of female flowers in Cucurbita pepo is delayed when plants are grown in high temperatures and during long photoperiods. Previous investigations indicated a similar effect of temperature and length of day on the sex of Ambrosia
Stress related sex problems may produce
hermaphrodite plants. The stress of what is
sometimes called "early flowering" (it is not
really early flowering, there is no such thing
as early flowering. We will explain this in a
moment) triggers the plant into a situation
where it thinks that its chances of
reproduction are slim to none. That situation
is a condition called - 'self-pollination'. It
does this by producing both male and female
flowers on the same plant. The male flowers
then pollinate the female flowers which will
eventually produce seeds. The reason for this
is that the plant notices that the photoperiod
is irregular and that it should no longer be in
the vegetative cycle but in flowering. This
shocks the plant into a last ditch effort to
receive pollen because it feels that it has
missed its chance to receive pollen already (in
the wild males release their pollen just around
the time that females begin to flower and
sometimes even before that).
.dmt-nexus.me/Files/Books/General/Cannabis20Grow%20Bible.pdf
