Assignment Help - homework help

  Xylem Complex Tissue

Introduction to Xylem Complex Tissue

Xylem (Greek word 'xylos'= wood) is a complex tissue which is chiefly accountable for the conduction of water and mineral salts from roots to another parts of the plant.  The xylem that is derived from procambium is termed as primary xylem and the xylem that is derived from vascular cambium, is termed secondary xylem.   Earlier created xylem elements are termed as protoxylem, while the later created xylem elements are termed as metaxylem. Xylem is formed of four types of cells -

1. Tracheids,

2. Vessels or tracheae,

3. Xylem fibres and

4. Xylem parenchyma.

Tracheids

Tracheids are elongated along with blunt ends. The lumen of it is broader than that of fibres. The secondary wall of them is lignified. In cross section, the tracheids come out polygonal and thick walled.   The pits are simple / bordered. There are dissimilar sorts of cell wall thickening because of deposition of secondary wall substances.  They are annular (like ring), spiral (like spring), scalariform (like ladder), reticulate (like net) and pitted   (consistently thick except at pits).  Tracheids are imperforate cells along with bordered pits on their end walls.  They are arranged one above the anoother. Tracheids are chief water that conducting elements in pteridophytes and gymnosperms.  Here, the conduction of water and mineral salts occurs by the bordered pits. They as well present mechanical support to the plants.

439_Xylem Complex Tissue Homework Help.jpg

Diagram: Tracheid                             

Vessels or Tracheae

At the end walls Vessels are perforated. The lumen of it is wider than that of tracheids. The perforated plates at the end wall separate the vessels. They take place parallel to the long axis of the plant body.  Because of dissolution of entire end wall, a single pore is created at the perforation plate. It is termed as simple perforation plate example Mangifera. If the perforation plate has several pores, then it is termed as multiple perforation plate. Example Liriodendron.

1740_Xylem Complex Tissue Homework Help 1.jpg

Diagram: Vessel

The secondary wall thickenings of vessels are

1. annular,

2. spiral, 

3. scalariform,

4. reticulate,

5. or pitted

1683_Xylem Complex Tissue Homework Help 2.jpg

                        Annular               Spiral                   Scalariform               Reticulate                    Pitted

Diagram: Types of secondary wall thickenings in tracheids

Vessels are chief water conducting elements in angiosperms and they are not present in pteridophytes and gymnosperms.  Though, in Gnetum of gymnosperms, vessels take place. The major function of vessel is conduction of water and minerals. It as well presents mechanical strength to the plant.

Xylem fibres

The fibres of sclerenchyma related with the xylem are termed as xylem fibres. They provide extra mechanical support to the plant body.  They are available both in primary and secondary xylem.   Xylem fibres are dead cells and comprise lignified walls with narrow lumen. Xylem fibres are also termed as libriform fibres.

1242_Xylem Complex Tissue Homework Help 3.jpg

Diagram: Xylem fibre

Xylem parenchyma

The parenchyma cells related with the xylem are termed as xylem parenchyma.  Xylem parenchyma is the just a living tissue among the constituents of xylem. The cell wall is thin and formed of cellulose.  The xylem parenchyma cells store food reserves in the type of starch and fat. They also help in conduction of water.

881_Xylem Complex Tissue Homework Help 4.jpg

Diagram: Xylem parenchyma

Latest technology based Biology Online Tutoring Assistance

Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Xylem Complex Tissue homework help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Xylem Complex Tissue, project ideas and tutorials. We provide email based Xylem Complex Tissue homework help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Xylem Complex Tissue. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Biology homework help and assignment help services. They use their experience, as they have solved thousands of the Biology assignments, which may help you to solve your complex issues of Xylem Complex Tissue. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
Home | Company Overview | Services | Discover Q&A | Sitemap | Contact Us | T & C | Refund Policy | Copyright Policy | Blog | Q&A | Directory

©TutorsGlobe All rights reserved 2022-2023.