plants are mainly affected by the biochemical cycle, carbon cycle and phosphorus cycle. describe them and...

70.2K

Verified Solution

Question

Biology

plants are mainly affected by the biochemical cycle, carboncycle and phosphorus cycle. describe them and how plants areaffected by them.
(subject: Plant Ecology)

Answer & Explanation Solved by verified expert

4.4 Ratings (583 Votes)

Carbon reactions of the photosynthesisSolar radiant energy ca 3 x 1021 Joulesyear is converted viaendergonic reactions in plants into carbohydrates ca 2 x 1011tonnes of carbonyear The capture of sunlight energy fortransformation into various forms of chemical energy is one of theoldest biochemical reactions on Earth One billion years agoheterotrophic cells acquired the ability to convert sunlight intochemical energy through primary endosymbiosis with acyanobacterium The original endosymbiosis has given rise to anenormous variety of organelles In general the transition fromendosymbiont to organelle involved both the loss of functionsunnecessary in the protected milieu of the host cell and the gainof other metabolic pathways The chloroplast is the place of boththe light and carbon reactions of photosynthesisThe products of the light reactions ATP and NADPH flow fromthylakoid membranes to the surrounding fluid phase stroma anddrive the enzymecatalyzed reduction of atmospheric CO2 tocarbohydrates and other cell components Because thestromalocalized reactions depend on products of the photochemicalprocesses and are also known to be regulated directly by lightthey are more properly referred to as carbon reactions ofphotosynthesis The incorporation of atmospheric CO2 intoorganic compounds appropriate for life is accomplished by theCalvinBenson cycle There are two major productsof the photosynthetic fixation of CO2 starch the reservepolysaccharide that accumulates transiently in chloroplasts andsucrose the disaccharide that is exported from leaves todeveloping and storage organs of the plantThe CalvinBenson cycleThe CalvinBenson cycle is found in many prokaryotes and in allphotosynthetic eukaryotes from the most primitive algae to themost advanced angiosperms It is also aptly named the reductivepentose phosphate cycleThe CalvinBenson cycle has three stagesThe CalvinBenson cycle was elucidated by M Calvin A Bensonand their colleagues in the 1950s It proceeds in three stages thatare highly coordinated in the chloroplast Figure211Carboxylation of the CO2 See Answer

Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:

Unlimited Question Access with detailed Answers
Zin AI - 3 Million Words
10 Dall-E 3 Images
20 Plot Generations
Conversation with Dialogue Memory
No Ads, Ever!
Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!

Become a Member