Isohydric

Part of speech: adjective

Definitions

1. A classification for organisms that preserve consistent internal water potential despite fluctuations in external moisture availability is presented by this term
2. This word identifies species that maintain their cellular hydration levels even when subjected to varying environmental water conditions
3. This term refers to organisms that regulate their internal water balance consistently, even when external moisture levels change significantly

Etymology: "Isohydric" is a technical coinage built from two parts. The prefix "iso-" comes from Greek "isos", meaning "equal" or "same", and it has long been used in science to mean uniform or constant. The second element, "hydric", relates to water, from Greek "hydōr", the source of English "hydro-" words like "hydrate" and "hydrogen." Put together, the term describes plants or systems that keep their water status roughly constant, even as conditions change. The word is used in plant physiology, where it contrasts with its partner term "anisohydric," which describes plants whose water potential drops considerably under drought. Isohydric species tend to close their stomata early to protect their internal water balance, while anisohydric species keep their stomata open and let their water potential fall further.