#Question id: 10809
#Unit 6. System Physiology – Plant
Sieve element sap is rich in sugars and other organic molecules, These molecules represent an energy investment for the plant. How their loss be prevented when sieve elements are damaged?
#Question id: 10810
#Unit 6. System Physiology – Plant
A mechanism for preventing sap loss entails closing sieve plate pores with callose, which is
#Question id: 10811
#Unit 6. System Physiology – Plant
In mature cells, P-protein occurs in several different forms depending on the species. Such as;
#Question id: 10812
#Unit 6. System Physiology – Plant
P-protein occur only in certain legumes and are encoded by members of the gene family known as;
#Question id: 10813
#Unit 6. System Physiology – Plant
A living cytoplasmic connection penetrate the walls between sieve tube elements and their companion cells; which are often complex and branched on the companion cell side, known as
#Question id: 10899
#Unit 6. System Physiology – Plant
Companion cells transport of photosynthetic products from producing cells in mature leaves to the sieve elements in the minor veins of the leaf. There are at least three different types of companion cells in the minor veins of mature, exporting leaves, All three cell types have dense cytoplasm and abundant mitochondria;