Editing Caper (section)

=== Environmental requirements ===
[[File:Capparis spinosa Negev.JPG|thumb|Thorny caper flower in [[Israel]]]]
[[File:Capparis cartilaginea open fruit.jpg|thumb|Open ripe caper fruit]]

The caper bush requires a semiarid or arid climate. The caper bush has developed a series of mechanisms that reduce the impact of high radiation levels, high daily temperature, and insufficient soil water during its growing period.<ref>Rhizopoulou, S. (1990). "Physiological responses of ''Capparis spinosa'' L. to drought." ''Journal of Plant Physiology'' '''136''': 341–348.</ref><ref>Levizou, E; P. Drilias; A. Kyparissis (2004). "Exceptional photosynthetic performance of ''Capparis spinosa'' L. under adverse conditions of Mediterranean summer." ''Photosynthetica.'' '''42''': 229–235</ref>

In response to sudden increases in humidity, the bush forms wart-like pockmarks across the leaf surface. It quickly adjusts to the new conditions and produces unaffected leaves.{{Citation needed|date=November 2020}}