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Aphid (Sitobion yakini) investigation suggests thin-walled sieve tubes in barley (Hordeum vulgare) to be more functional than thick-walled sieve tubes

B. Matsiliza ; C. Botha | 2002

Barley, like most other grasses that have been studied, contains two kinds of sieve tube. The first formed are called thin-walled sieve tubes because of their thin wall compared to the late-formed, and are associated with companion cells. The la[...]

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Plasmodesmatal frequency in relation to short-distance transport and phloem loading in leaves of barley (Hordeum vulgare). Phloem is not loaded directly from the symplast

C. Botha ; R. Cross | 1997

We investigated the phloem loading pathway in barley, by determining plasmodes-matal frequencies at the electron microscope level for both intermediate and small blade bundles of mature barley leaves. Lucifer yellow was injected intercellularly [...]

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Role des pucerons dans les recherches sur le liber

C. Bornman ; C. Botha | 1973

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