Can cactus absorb the radiation?

Cactus is a fleshy plants like sunlight, to reduce moisture evaporation, thus reducing leaf surface area, evolved into a needle, which is to adapt to the natural environment. "Xuming Ren said cactus morphology, is to resist the sun, UV damage, and the computer screen, or other electrical appliances produced by radiation is different from the so-called radiation is an invisible wave, including the three αβγ ray, where the strongest γ-ray has the ability to any organism, and destroys the cell's DNA, can cause severe mutations, while the sun is a "radiant energy" as the same candle would heat will not have immediate harm to human body. Therefore, the contents of the cactus as a rumor a tool to resist radiation, is without any basis.