![]() ![]() Their unified body has less surface area for photosynthesis, but works perfectly to conserve moisture in high heat and does not depend on continuous root pumping to maintain the plant. Cactus and succulents from the North American Southwest have evolved great tolerance to heat and soil moisture deficits. Larger plants become progressively more tolerant of higher temperatures. Small plants (up to 45 leaves) are more susceptible to the higher temperatures encountered in many nursery environments. I have clipped a healthy bright yellow root and placed it in 80F water and watched it turn necrotic brown in 2 minutes. Respiratory enzymes may also be disabled by temps above 80 F. With higher temperatures the cellular engine “races to redline” and more oxygen cannot diffuse fast enough to serve the cells’ needs. Root cells only function well up to about 75 F. ![]() Lack of moisture for a long time will produce such a collapse also. roots suffocate or overheat the plant collapses and the rosette closes. When the power is cut the snowmen collapse. like one of the lighted blow-up snowmen we see on lawns at X-mas. The root cells require much oxygen to do this, thus the need for a soil which has great macropores that facilitate drainage and the diffusion of oxygen into the soil. is a water balloon inflated by hard-working roots which inflate each leaf firmly, driving new growth. Recognition of these basics will lead you to a solution in plant management which will give you great joy and success cultivating A.p.įirst, some plant physiology. Many plant lovers have lost their prized specimens because of such misunderstanding. Most species of cactus and succulents are more tolerant of a wider range of temperatures, soil moisture, and exposure. ![]() Few plant species have evolved with such a narrow altitudinal range (7500 ft to 8700 ft ), live only on sites facing the equator, and must be bathed in a compost tea flowing from the grassland above. Submitted by: Alan C Beverly Fall long been aware of the narrow range of environmental conditions A.p. ![]()
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