Cladophyll


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cladophyll

[′klad·ə‚fil]
(botany)
A branch arising from the axil of a true leaf and resembling a foliage leaf. Also known as cladode.

Cladophyll

 

(also cladode), the modified shoot of plants with a flattened foliaceous stem, which performs the functions of a leaf. The leaves of a cladophyll are severely reduced, forming thorns or falling off early. The cauline nature of a cladophyll is indicated by its position in the axil, which is usually squamose, and by the formation of flowers, which never occurs on true leaves.Cladophylls characterize plants in drought areas and are considered adaptations for decreasing evaporation (their smaller surface and vertical position). They form in various plants, including asparagus and smilax. Sometimes cladophylls that stop growing early and resemble leaves are called phylloclades—for example, Ruscus and Phyllocactus.

References in periodicals archive ?
Cladophyll diameter in ASP-69 was significantly greater than in ASP-03 (Table 3).
s], SLW, and cladophyll diameter in comparison with the low-yielding cultivar ASP03.
In temperate conditions, photosynthetic activity in asparagus is maintained for approximately 4 mo from late spring to late summer and then all cladophyll tissue senesces within a few weeks in the fall.
Both cultivars showed a significant decline in A in senescent cladophyll tissue in April, although most of the senescing cladophylls retained their chlorophyll content.
In the present study, both cultivars had significantly lower net photosynthesis rates in the senescent cladophyll measured in April in comparison with the mature cladophyll measured in March.
Apart from the physiological differences, differences in cladophyll properties are also likely to play a significant role in determining the rate of photosynthesis in the two cultivars.
Comparison of cladophyll diameter, specific leaf weight (SLW), and carbohydrate content (soluble sugar and starch) in mature cladophylls of ASP-03 and ASP-69.
Chlorophyll fluorescence of cladophylls measured with a portable fluorometer (Mini-PAM-2000, Walz, Germany) was used to assess the photochemical efficiency of photosystem II (PSII).
Freeze-dried cladophylls were used for soluble sugar and starch determination by a phenol-sulfuric acid method (Tissue and Wright, 1995).