Simple sieve plate with single perforation is present in |
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a) |
Cucurbita |
b) |
Prunus |
c) |
Pyrus |
d) |
Vitis |
Simple sieve plate with single perforation is present in |
|||||||
a) |
Cucurbita |
b) |
Prunus |
c) |
Pyrus |
d) |
Vitis |
(a) In phloem, sieve tubes possess the perforated oblique or transverse sieve plates. Sieve plates are called simple when they consists of one region of pores (e.g., Cucurbita, Nicotiana) or compound when they consists of several pored regions separated by bars or wall thickenings (e.g., Vitis). |