“If sap analysis tells me the old leaves are running short of potassium, while the new leaves seem OK, it means the plant is sending its potash reserves to new growth as it is not getting it from the ...

The exact science of tree sap transport has puzzled plant physiologists for many years. Sap's migration throughout tree trunks and branches is linked heavily to transpiration, the movement and ...

Careful cutting of the hypocotyl of Ricinus communis L. seedlings led to the exudation of pure sieve-tube sap for 2—3 h. This offered the possibility of testing the phloem-loading system qualitatively ...

Given the sheer number of potential enemies, plants are resistant to most pests, even if they can cause damage to other plants. Researchers describe a newly discovered mechanism that protects a wild ...

image: Leafhopper of the genus Empoasca on a tobacco leaf: A research team at the Max Planck Institute for Chemical Ecology in Jena has now elucidated the chemical defense that tobacco plants use to ...