We have investigated the consequences of endogenous limitations in oxygen delivery for phloem transport in Ricinus communis. In situ oxygen profiles were measured directly across stems of plants ...

Seasonal collections of stems of various ages were made of Celastrus scandens L., Parthenocissus inserta (Kerner) Fritsch, and Vitis riparia Michx. In C. scandens, cambial activity, phloem ...

Plasmodesmata are plant-unique intercellular communication channels that acquired the capacity to dilate significantly to allow the trafficking of proteins and RNA within a symplasmic domain. This ...

Phloem diseases, including the economically devastating citrus greening, are particularly difficult to study because phloem cells -- essential for plant nutrient transport -- are difficult to access ...

Researchers monitored the progression of phloem production over time in field-grown HLB-affected citrus trees to determine how the trees are capable of sustaining new growth. Results showed that new ...

In vascular plants, long-distance transport of photoassimilates is driven by a pressure gradient within the phloem. It is a highly specialised tissue consisting of a network of living, tube-shaped ...