Phloem-sap feeding by animals: problems and solutions
نویسندگان
چکیده
منابع مشابه
Phloem-sap feeding by animals: problems and solutions.
The incidence of phloem sap feeding by animals appears paradoxical. Although phloem sap is nutrient-rich compared with many other plant products and generally lacking in toxins and feeding deterrents, it is consumed as the dominant or sole diet by a very restricted range of animals, exclusively insects of the order Hemiptera. These insects display two sets of adaptations. First, linked to the h...
متن کاملPhloem sap intricacy and interplay with aphid feeding.
Aphididae feed upon the plant sieve elements (SE), where they ingest sugars, nitrogen compounds and other nutrients. For ingestion, aphid stylets penetrate SE, and because of the high hydrostatic pressure in SE, phloem sap exudes out into the stylets. Severing stylets to sample phloem exudates (i.e. stylectomy) has been used extensively for the study of phloem contents. Alternative sampling tec...
متن کاملPhloem sap proteins: their identities and potential roles in the interaction between plants and phloem-feeding insects.
The phloem is a well-known target of sucking and piercing insects that utilize the transported fluid as their major nutrient source. In addition to small molecules like sugars and amino acids, phloem sap of higher land plants contains proteins that can accumulate up to high concentrations. Although the knowledge about the identities of these phloem sap proteins is increasing, the functions of m...
متن کاملEffect of Potassium Supply on the Rate of Phloem Sap Exudation and the Composition of Phloem Sap of Ricinus communis.
The composition of phloem sap has been investigated in Ricinus communis var. gibsonii, grown for 2 weeks on nutrient solution of low and high potassium content (K(1) and K(2)). Diagonal cuts were made in the bark of the stem resulting in the exudation of clear droplets which mainly consisted of phloem sap. Although the plants at low K (0.4 mm) and high K (1 mm) did not differ in growth, leaf ar...
متن کاملFeeding the newborn: comparative problems in man and animals.
The human problems that we will hear about later in this meeting concern feeding babies of unusual weights; first, babies that weigh too little at birth and secondly, babies that weigh too much after birth because they have been over-fed. Somewhat similar situations occur in animals, either in their natural circumstances, or as a result of experimental procedures. I shall describe examples of t...
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ژورنال
عنوان ژورنال: Journal of Experimental Botany
سال: 2006
ISSN: 1460-2431,0022-0957
DOI: 10.1093/jxb/erj067