As user @Tyto alba said, the stream you are telling about, is called plant physiology; so you would need some plant physiology textbook.
For a general account on all aspects of plant physiology, and where the plant metabolisms are specialized than from animal metabolism; a very good book is
Plant physiology by Lincoln Taiz and Eduardo Zeiger, Sinauer publication.
(cover picture from here).
There are ample changes in different editions, we commonly used the 3rd and 5th edition. There are more current editions too.
Google books link, Ed-5 content (pdf) by Sinauer , Ed-6 in official website of publisher, and currently active companion website for 6th edition.

The 6th edition have a changed title, "Plant physiology and development", with addition of more authors Ian M. Møller, and Angus Murphy.
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For a basic, student-friendly book, Visit Introduction to plant physiology by Hopkins.
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The book is very much conceptual, the language is lucid, and there are many helpful illustrations in line drawing.
There are Newer editions of this book, assisted by N. P. Huner.
Google book link to 2nd Ed content, All editions, Publisher website (Willey) official link.
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For an encyclopedic account, covering all aspects of plant physiology,
Visit Plant physiology by Salisbury and Ross.

Link to Google book 4th Ed,
Publisher: Wadsworth Publishing Company. (No mention of this book on website curently)
Link on Amazon and Flipkart.
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For more detailed biochemical aspects: (also for the basics of applied metabolic chemistry for crop production)
Plant biochemistry, by Hans Walter Heldt, assisted with Fiona Heldt, Elsevier

The original book is in German, but English-translated edition is popular worldwide.
Also available under heading, "Plant Biochemistry and Molecular biology".
A standard basic textbook, very-much conceptual, as well as student-friendly. Contains lot of detailed diagram and Sketches.
Publisher (Elsevier) Link to 3rd Edition, 4th Edition
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Another wonderful book, for basics in details, is
Plant Metabolism, edited by Dennis, Turpin, Lefebvre and Lyzell.

Publisher: Longman ( Pearson )