منابع مشابه
Cuscuta europaea plastid apparatus in various developmental stages
It was generally accepted that Cuscuta europaea is mostly adapted to a parasitic lifestyle with no detectable levels of chlorophylls. We found out relatively high level of chlorophylls (Chls a+b) in young developmental stages of dodder. Significant lowering of Chls (a+b) content and increase of carotenoid concentration was typical only for ontogenetically more developed stages. Lower content of...
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Field observations showed that in its native Texas grasslands, dodder (Cuscuta attenuata) grows more vigorously in patches of mixed host species than in monospecific host patches. Field experiments with naturally occurring host individuals demonstrated that the parasite achieved greater volume when simultaneously infesting two hosts of differing species rather than two hosts of the same species...
متن کاملPhloem Unloading of Amino Acids at the Site of Attachment of Cuscuta europaea.
By washing out (14)C-solutes or (3)H-solutes in 0.5 mm CaSO(4) during a period of 5 to 6 hours, the release of amino acids by excised stem segments of broad bean (Vicia faba L. cv Witkiem) was studied. Three hours after pulse labeling with l-valine, l-asparagine, or alpha-aminoisobutyric acid (AIB), hollow stem segments were excised from the plant and incubated in a washout solution.In experime...
متن کاملFree choice permission as resource-sensitive reasoning
Free choice permission is a long-standing puzzle in deontic logic and natural language semantics involving a so-called conjunctive use of or: from You may eat an apple or a pear, we can infer that You may eat an apple and that You may eat a pear—but not that You may eat an apple and a pear. Following Lokhorst 1997, I argue that because permission is a limited resource, a resource-sensitive logi...
متن کاملOnline Personalized Resource Allocation with Customer Choice
Authors are encouraged to submit new papers to INFORMS journals by means of a style file template, which includes the journal title. However, use of a template does not certify that the paper has been accepted for publication in the named journal. INFORMS journal templates are for the exclusive purpose of submitting to an INFORMS journal and should not be used to distribute the papers in print ...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1992
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.89.24.12194