Primeira Fase da Fotossíntese - Fotoquímica ou Luminosa

Monday, March 21, 2011

     Ocorre quando a planta está iluminada. Simplificando, é quando há a fotólise da água, redução do NADP e do NADPH, desprendimento de oxigênio. Acontece nas membranas dos tilacóides, e apresenta as seguintes etapas: 

1- Absorção da luz

     A energia luminosa é absorvida pelas moléculas da clorofila. Nesse processo a energia luminosa excita a clorofila, que perde elétrons para uma substância aceptora de elétrons. A clorofila recupera seus elétrons a partir da molécula de água, que é então quebrada originando o gás oxigênio (O2). Essa reação é denominada fotólise da água, ou Reação de Hill em homenagem ao seu descobridor.

2H2O + LUZ ----> O2 + 4H+ (íons higrogênio) + 4e- (elétrons)

     O gás oxigênio é liberado para a atmosfera, onde representa 21% do volume do ar atmosférico. Praticamente todo gás oxigênio presente na atmosfera é resultante do processo de fotossíntese.

2- Transporte de elétrons

     Os elétrons da molécula da clorofila que foram excitados e transferidos ao aceptor de elétrons continuam sendo transferídos de aceptor para aceptor atraves de uma CADEIA DE TRANSPORTE DE ELÉTRONS. O último aceptor dos elétrons é o NADP (do inglés Nicotinamide Adenine Dinucleotide Phosphate). que se trensforma em NADPH ao receber os elétrons. Ampliando a reação teremos:

2H2O + 2NADP+ + LUZ ----> O2 + 4H+ + NADPH

3- Produção de ATP

     A energia liberada pelos elétrons ao passar pelos elos da cadeia de transporte força os prótons a passar pela membrana dos tilacóides, no sentido do estroma do para o lúmen. Com o acúmulo de prótons no lúmen, estes tendem da deixar esse compartimento por uma proteína de membrana que sintetiza ATP a partir de ADP e fosfato quando há fluxo de protóns deixando o lúmen dos tilacóides em direção ao estroma.

59 comments:

Anonymous said...

We are a group of volunteers and opening a new
scheme in our community. Your web site offered us with
valuable information to work on. You've done a formidable job and our entire community will be thankful to you.

Also visit my webpage :: Best Wrinkle Creams

Anonymous said...

It's actually a nice and useful piece of info. I'm happy
that you just shared this helpful information with us.
Please keep us up to date like this. Thanks for sharing.


Feel free to visit my web-site: Garcinia Cambogia benefits

Anonymous said...

Have you ever considered about adding a little bit more
than just your articles? I mean, what you say is valuable and all.
Nevertheless think about if you added some great graphics or videos
to give your posts more, "pop"! Your content is excellent but with images and clips, this site
could undeniably be one of the best in its niche. Fantastic blog!


My web-site :: Revitalize

Anonymous said...

I'm extremely impressed along with your writing skills as smartly as with the structure on your weblog. Is that this a paid theme or did you customize it yourself? Either way keep up the excellent high quality writing, it is rare to look a nice blog like this one nowadays..

my webpage: 1285muscle review

Anonymous said...

Greetings! Very helpful advice in this particular post!

It's the little changes that make the largest changes. Many thanks for sharing!

Also visit my site: Buy liposom

Anonymous said...

For the reason that the admin of this web page is working, no
doubt very quickly it will be famous, due to its feature contents.


Visit my page; Garcinia Cambogia Diet

Anonymous said...

This text is priceless. Where can I find out more?

my blog post ... 1285 muscle review

Anonymous said...

My spouse and I absolutely love your blog and find the majority of your post's to be what precisely I'm
looking for. Does one offer guest writers to write content available for you?
I wouldn't mind writing a post or elaborating on many of the subjects you write related to here. Again, awesome blog!

Also visit my weblog :: Pro Collagen Serum

Anonymous said...

I am really enjoying the theme/design of your site. Do you ever run into any browser compatibility issues?
A handful of my blog visitors have complained about my website not operating correctly in Explorer but looks great in
Chrome. Do you have any solutions to help fix this problem?



Here is my webpage :: power pump muscle builder

Anonymous said...

Quality content is the secret to interest the people to go to see the web site, that's what this site is providing.

My web site: Ripped Muscle Xtreme Reviews

Anonymous said...

Piece of writing writing is also a excitement, if you know then
you can write otherwise it is difficult to write.


My web-site order acai ultra lean

Anonymous said...

Heya! I realize this is sort of off-topic however I needed to ask.
Does building a well-established blog such as yours require a lot of
work? I'm completely new to operating a blog but I do write in my journal everyday. I'd like to start a blog so I can share my experience and thoughts online.
Please let me know if you have any kind of recommendations or tips for brand new aspiring blog owners.

Appreciate it!

Also visit my homepage ... Anatomy X5 Diet

Anonymous said...

That is a very good tip particularly to those fresh to the
blogosphere. Short but very precise info… Appreciate your sharing this one.
A must read article!

Feel free to surf to my site :: Diet Patches

Anonymous said...

bookmarked!!, I really like your blog!

My site - Sytropin

Anonymous said...

Hi there! Do you use Twitter? I'd like to follow you if that would be okay. I'm undoubtedly enjoying your blog and look forward to new updates.


Here is my blog post - TruVisage Reviews

Anonymous said...

It's an remarkable paragraph designed for all the online people; they will get advantage from it I am sure.

Also visit my weblog ... buy garcinia cambogia

Anonymous said...

I do not know whether it's just me or if everybody else experiencing issues with your blog. It appears as if some of the text within your posts are running off the screen. Can someone else please provide feedback and let me know if this is happening to them too? This could be a problem with my browser because I've had this happen previously.
Cheers


http://mae.co.nz/member/102994/

Anonymous said...

Hmm is anyone else having problems with the images on this blog loading?
I'm trying to determine if its a problem on my end or if it's the blog.
Any feed-back would be greatly appreciated.

Take a look at my page: Buy Anatomy X5

oakleyses said...

moncler, ugg, pandora jewelry, pandora jewelry, ugg uk, thomas sabo, moncler uk, louis vuitton, canada goose uk, replica watches, juicy couture outlet, montre pas cher, pandora charms, swarovski crystal, canada goose, canada goose jackets, toms shoes, canada goose, coach outlet, moncler outlet, moncler outlet, karen millen uk, wedding dresses, ugg,uggs,uggs canada, canada goose outlet, juicy couture outlet, canada goose outlet, supra shoes, louis vuitton, pandora uk, swarovski, doudoune moncler, canada goose, moncler, louis vuitton, moncler, hollister, louis vuitton, canada goose outlet, louis vuitton, ugg pas cher, marc jacobs, ugg,ugg australia,ugg italia, links of london, moncler

Instagram Downloader said...

Really helpful article. Great share
Downloader4Insta

Wiral Eyes said...

I am so grateful for your article. Much thanks.
IMessag

Unknown said...

I am so grateful for your article. Much thanks.
Instagram Downloader Follower

Rashid Awan said...

Thanks for sharing awesome Information
Removeable Guide

STARS HIDE said...

Really helpful article. Great share
iMessage Guide

MainMuzammil said...


I am so grateful for your article. Much thanks.
downloader4insta

kuch bhi said...

Really helpful article. Great share
Vixari Tripod- VOVO

Zubair Ahmad said...

Thats the Good work for all. Thanks.
Guardrail

MainMuzammil said...

Thanks for your tremendous article just xheck out our site for instagram video downloaderinstagram downloader photo

Instagram Downloader said...

Instagram Video Downloader
Instagram Video Downloader
Instagram Video Downloader

Anonymous said...

Awesome so nice i am seeing article like this . Really great help .Thanks
PREOWNED Iphones
PREOWNEDIphones
Iphones
PREOWNED

Rashid Awan said...

Awesome so nice i am seeing article like this Really Helpfull Article Great
PreOwned Phones
PreOwned Phones
PreOwned iPhones
PreOwned iPhones
PreOwned iPhones

Rashid Awan said...

Awesome so nice i am seeing article like this Really Helpfull Article Great
PreOwned Phones 8
PreOwned Phones 8
PreOwned iPhones 8
PreOwned iPhones 8
PreOwned iPhones 8

Zubair Ahmad said...

"Thanks for this comlete list. I have check all of these websites, all are in working
and I get many of the backlinks for my website. Thanks...

IG Reviews deviantart

IG Reviews viki

IG Reviews livejournal

IG Reviews worldcosplay

IG Reviews openstreetmap

IG Reviews metal-archives

Zubair Ahmad said...

"Thanks for this complete list. I have check all of these websites, all are in working
and I get many of the backlinks for my website. Thanks...

SocialSteeze Reviews n4g

SocialSteeze Review splice

SocialSteeze Reviews tupalo

SocialSteeze Reviews gfycat

SocialSteeze Reviews public

SocialSteeze Review gust

Anonymous said...

I am Searching for this article. Its really Great HelpFull Thanks
PreOwnedphones 8
PreOwnedphones 8
PreOwnedphones 8
PreOwnedphones 8
PreOwnedphones 8
PreOwnedphones 8

Anonymous said...

I am Searching for this article. Its really Great HelpFull Thanks
PreOwnedphones 8
PreOwnedphones 8
PreOwnedphones 8
PreOwnedphones 8
PreOwnedphones 8
PreOwnedphones 8

jimmycharlis said...

Really helpful article. Great share

toyotae

myfolio

weheartit

mobypicture

spreaker

Rashid Awan said...

I also found, your posts very interesting. In fact after reading, Its really Great HelpFull Thanks
Linkd

Rashid Awan said...

I am Searching for this article. Its really Great HelpFull Thanks
Refurbished

jimmycharlis said...

Really helpful article. Great share

loveshack

Dhow cruise in dubai said...

Hi when you visit Dubai,then don't forget dhow cruise dubai dinner book with us. It will be most enjoyable and memorable. visit us and also enjoy the musandam oman tour

zain jahangir said...

Wow Great i am in searching of this Post . You Explain the Topic Very Well . Thanks And you can also know about curtains by Visit!this site

zain jahangir said...

Wow Great i am in searching of this Post . You Explain the Topic Very Well . Thanks And you can also know about curtains by Visit this site

herry said...

Wow Great i am in searching of this Post . You Explain the Topic Very Well . Thanks And you can also know about curtains by Visit this site

Pest Control Services said...

you may know about electronics shops in dubai by visiting our site

Pest Control Services said...

you may know about electronics shops in dubai by visiting our site

Pest Control Services said...

Kala Lending, LLC was established in March 2009. We want to be your one stop shop to help you in meeting your goals for almost any type of loan that you may need. Explore more about us byVisiting our site

Jesus Andrus said...

Give your furry friend the gift of comfort with this super soft Calminnng Pet Bed "Linksys" for dogs and cats.
Our beds feature a round design, creating a cozy and protective atmosphere.
Pets will feel surrounded by love and warmth, allowing them to experience truly restful sleep.
The bolstered edge also acts as a headrest, offering additional orthopedic support.

Jesus Andrus said...

Give your furry friend the gift of comfort with this super soft Calminnng Pet Bed "BestAutomaticPetFeeders" for dogs and cats.
Our beds feature a round design, creating a cozy and protective atmosphere.
Pets will feel surrounded by love and warmth, allowing them to experience truly restful sleep.
The bolstered edge also acts as a headrest, offering additional orthopedic support.

karren said...
This comment has been removed by the author.
Shahnawaz Alvi said...
This comment has been removed by the author.
Morning Desert Safari said...

VIP Desert Safari Dubai






Evening Desert Safari

Camel Riding Dubai

Abu Dhabi City Tour

Things to do in Dubai


Red Dune Desert Safari Dubai

deraz said...

خدمات الشارقة – المحترف للصيانة - الامارات
نجار الشارقة
تركيب غرف نوم بالشارقة

Dhow cruise in dubai said...

when you visit Dubai, then don't forget to visit the dhow cruise creek for dinner. It will be most enjoyable and memorable. visit us and enjoy dhow cruise Dubai. visit us for more details.

menna said...

بروف
شركة تنظيف مسابح بعجمان
شركة تنظيف سجاد بالبخار بعجمان
تنظيف موكيت بالبخار بعجمان
شركة تنظيف كنب بالبخار فى عجمان
شركة تنظيف ستائر بالبخار بعجمان
شركة تنظيف بالبخار بعجمان
تنظيف بالبخار فى بعجمان
شركة نظافة فى عجمان
شركة تنظيف بعجمان
شركات تنظيف فلل بعجمان
شركات تنظيف المبانى فى بعجمان
شركة تنظيف شقق فى بعجمان
شركة تنظيف منازل فى بعجمان
شركة مكافحة حشرات بعجمان
شركة مكافحة الصراصير بعجمان
شركة مكافحة الفئران بعجمان
شركة مكافحة الرمة بعجمان
شركة مكافحة البق بعجمان

Desert Adventure said...

The journey from Dubai to Swahan takes 1 hour and 15 minutes. Dubai, Abu Dhabi and Al Ain are all connected by this Vip desert safari.

Desert safari dubai said...

The way you write, you are a really professional blogger.best luxury desert safari dubai

menna said...

شركة مكافحة البق ابو ظبى
شركة مكافحة النمل الابيض ابو ظبى
شركة تنظيف شقق ابو ظبى

Kk said...

Are you looking for Dhow Cruise then clickwww.dhowcruisedubai.org/

Post a Comment

 

Posts Comments

©2006-2010 ·TNB