Root hair一 Apoplast path of waters -Symplast path of water Epidermis Plasmodesmata It should be borne in mind that the effect of metabolism on water uptake and retention is an indirect one ENdodermis rachear Tr elements导管分子 Water may also travel through the root cortex via the cellular pathway including membrane transport (transmembrane pathway)or through plasmodesmata 胞间连丝( symplastic pathway) The cytoplasm of one plant cell is generally connected to the cytoplasm of neighboring cells by numerous plasmodesmata This cytoplasmatic continuum is called the sympalst
导管分子 中柱鞘 Water may also travel through the root cortex via the cellular pathway including membrane transport (transmembrane pathway) or through plasmodesmata 胞间连丝(symplastic pathway) The cytoplasm of one plant cell is generally connected to the cytoplasm of neighboring cells by numerous plasmodesmata. This cytoplasmatic continuum is called the sympalst. It should be borne in mind that the effect of metabolism on water uptake and retention is an indirect one
Symplast共质体 and apoplast质外体 endodermis ylem symplastic route (intracellular) cortex phloem Casparian strip apoplastic route pericycle (extracellular)
Symplast共质体 and apoplast质外体 symplastic route (intracellular) apoplastic route (extracellular)
Part cross-section of primary root -two pathways for movement of water nutrients Within cells Cortex Symplastic Stele pathway Early metaxylem Late metaxylem Root hairs Phloem Endodermis Between chls Casparian band apoplast Exodermis (hypodermis c pathway Rhizodermis
‘Symplastic ’ pathway ‘Apoplasti c’ pathway Part cross-section of primary root - two pathways for movement of water & nutrients Within cells Between cells
The exodermis as a barrier(some species) Cortex皮层 Symplastic stee中柱 pathway Early metaxylem 早期后生木质部 Late metaxylem Root hairs ik Phloem 末期后生木质部 韧皮部 Endodermis内皮层 Casparian band 凯氏带 Uptake blocked Exodermis (hypodermis Rhizodermis外皮层 表皮层
‘Symplastic’ pathway The exodermis as a barrier (some species) Uptake blocked 外皮层 表皮层 早期后生木质部 末期后生木质部 皮层 中柱 韧皮部 内皮层 凯氏带
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