Term
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Definition
| photosynthesis chlorophyll stomata opening and closing, temperature, translocation |
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Term
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Definition
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Term
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Definition
| -absence of light(the leaves wont be green, and varigation can go away). |
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Term
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Definition
| -open in light, closed in dark |
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Term
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Definition
| -light warms the plant surface |
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Term
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Definition
| -in light the food moves to the stem, in dark the food moves to the roots |
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Term
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Definition
refers to broghtness
the limiting factor in growing and maintaining plants |
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Term
| light intensity dependant upon |
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Definition
| seasons, cloud cover, obstructions-inside and outside, refections |
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Term
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Definition
1/4" thick
clear allows 89% light
gray allows 41% light
bronze allows 21% light |
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Term
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Definition
white wall-90%
mirrors 80-90%
gray-beige 50%
draperies 35% |
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Term
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Definition
response to length of day-photoperiodism
plants grow better when exposed to long days
low light for long areas-bright light for few hours |
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Term
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Definition
for plants white light is best
photosynthesis requires red
red light promotes stem elongation |
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Term
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Definition
take several readings and average
measured by foot candles- 1foot from candle
lux-1 meter from location |
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Term
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Definition
| plants are to produce new leaves at a rate sufficient to replace leaves lost in normal aging(want more leaves, give more light |
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Term
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Definition
plant maintenance varies w/each species
flowering plants require brighter light
color and varigated leaves require higher light
permits plants to function at a level slightly exceeding the point where photosynthesis=respiration |
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Term
| how plants react to light |
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Definition
bright light-short internodes
low light- leaves yellow, drop new weak growth
too bright leaves scorch |
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Term
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Definition
| natural sun-use as much natural sun as possible, incoming light falls off rapidly-will not reach beyond 15', place within 45d area |
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Term
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Definition
may serve ual role, room and plant lighting
ex:ligthing is 25ftc, plant needs 100ftc, add 75ftc
ceiling height less than 12' flourescent lamps good |
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Term
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Definition
| incadesscent, flourescent |
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Term
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Definition
compact light source
low installation cost
high output for size of lamp
available in wide range of wattage
fits into attractive fixtures
requires no ballast |
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Term
| incandescent disadvantages |
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Definition
produces alot of heat
not energy efficient
light is high in orange and red
relatively short lived-750hrs
distribution on flat surface is uneven
loss of efficiency over time |
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Term
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Definition
low pressure mercury
high in blue and yellow-green
some lamps are reddish blue |
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Term
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Definition
being fazed out to CFLs
most widely used
produce red light - low in blue |
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Term
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Definition
most efficient light
burns cool
light emmission is not changed with dimmers
life 12-18 times incandescent
light distribution is more even |
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Term
| fluorescent disadvantages |
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Definition
installation is expensive
lamps low in red
variation in light due to:voltage, ballast, starts and hours burning
last 3" of lamp produces little light
2 warm and 2 cool white bulbs emit 1000ftc at 6", 600ftc at 12", 260ftc at 24" |
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Term
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Definition
mirrors
paint walls white
add skylights
paint overhang white
prune/thin outside trees/shrubs
use a white pebble tray |
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Term
| frequent watering can cause a salt build up |
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Definition
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Term
| stomata is typically closed in dark |
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Definition
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Term
| CA is #1 in houseplant production state |
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Definition
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Term
| food is translocated to the roots in dark |
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Definition
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Term
| the current houseplant industry started in the 70s |
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Definition
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Term
| all the leaf needs is water and carbon dioxide to make food |
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Definition
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Term
| as plants with colored leaves lose their color they also produce less food |
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Definition
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Term
| a pvc pipe can be used to help in providing for excess water in containers |
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Definition
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Term
| the cuticle is a protective coating on the leaf blade |
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Definition
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Term
| the quickness that water comes out of the pot can be used to help determine watering |
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Definition
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Term
| all living plant cells require oxygen for respiration |
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Definition
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Term
| plants in bright light warm rooms and large pots generally need more water |
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Definition
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Term
| houseplants need more light in winter so place them in the window to increase light |
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Definition
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Term
| light duration is the length ot time that the lights are on |
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Definition
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Term
| many of our houseplants are grown for their flowers |
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Definition
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Term
| there are three different types of roots systems |
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Definition
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Term
| which is not an advantage of incandescent lights |
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Definition
| the light is high in orange and reds |
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Term
| which is an advantage of florescent lights |
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Definition
| the light distribution is more even than incandescent |
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Term
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Definition
growth needs higher light intensity
minimum amout of light in regards to compensation point
flowering plants need brighter light to flower |
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Term
| window exposure and distance |
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Definition
does not reach past 15'
within 45deg angle
indoor items can reflect light
tinted glass
seasons, cloud cover, obstructions-inside and out
placing wrong plants near window can cause sun scorch |
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