diaheliotropism
- noun
- /ˌdaɪəˌhiːləˈtroʊpɪzəm/
- Specialized
- Plants exhibit diaheliotropism by adjusting their leaves to continuously face the sun, enhancing their ability to perform photosynthesis.
Examples
-
A number of desert dicotyledonous annuals exhibit diaheliotropism (Figure 3), a precise form of solar tracking by leaves that allows them to be oriented perpendicular to direct sunlight at all times throughout the day.
Academic text (1998) -
Diaheliotropism maximizes interception of solar radiation and, thus, total daily photosynthesis, while maximizing solar heating from infrared radiation.
Academic text (1998) -
Certain flowers demonstrate diaheliotropism, turning their petals to catch the sunlight for optimal growth during the day.
-
In regions with strong sunlight, the diaheliotropism of leaves helps protect the plant from excessive heat while maximizing light absorption.
Synonyms
1
9.9
A plant's movement or growth toward the sun to get more light
1
9.3
Growth toward light by a plant or other living thing
Surface Forms
Morphology
diaheliotropism = heliotropism (semi-transparent) = dia + helio + trop + ism
The word is transparently related to heliotropism, but the added dia- element and the specialized botanical sense are not obvious to an average learner.
Etymology
The word diaheliotropism breaks into dia- ('across' or 'toward'), helio- ('sun'), and -tropism ('turning'). So it means plants 'turn toward the sun', which explains why leaves and flowers move to face sunlight.