chapter 6 Organics transport
chapter 6 Organics transport
Organics transport pathway and solutes。 Organics transport mechanism in the phloem Factors affecting the organics transport Translocation of the organics
➢ Organics transport pathway and solutes. ➢ Organics transport mechanism in the phloem. ➢ Factors affecting the organics transport. ➢ Translocation of the organics
Transport pathway--through Phloem (A)
Transport pathway —through Phloem
桃树茎横切 对次生木质部 年轮线 形成层 次生韧皮部 周皮
Phhoem anatomy Phloem Cambial 圆 reglon Xylem 1o0 ums
Phhoem anatomy
(b) Effects of girdling the trunk of a tree (a) at the beginning (b)swelled bark above
Effects of girdling the trunk of a tree (a) at the beginning (b) swelled bark above
The structure of phloem tissue SE-CC complex Conce Sieve element (se): conducting cell connected through specialized sieve plates. companion cell(CC): intimately associated with the Se, provide metabolic support for se
The structure of phloem tissue SE—CC complex ➢ Sieve element (SE): conducting cell connected through specialized sieve plates. ➢ companion cell (CC): intimately associated with the SE, provide metabolic support for SE
sieve plate pore of sieve plate sieve tube member companion cell companion cell pore of sieve plate Figure 19.6 Mature sieve tube member and adjacent companion cell. The inset shows one type of sieve plate
KAtudying the transported solutes 1 mm
Studying the transported solutes
Studying the transported solutes Aphids(蚜虫) feeding on plants by inserting a long mouthpart into SE cut the mouthpart Pholem sap exude
Studying the transported solutes Aphids (蚜虫) feeding on plants by inserting a long mouthpart into SE cut the mouthpart Pholem sap exude