Evolution of the C4 photosynthetic mechanism: are there really three C4 acid decarboxylation types?
نویسندگان
چکیده
منابع مشابه
Evolution of the C(4) photosynthetic mechanism: are there really three C(4) acid decarboxylation types?
Some of the most productive plants on the planet use a variant of photosynthesis known as the C(4) pathway. This photosynthetic mechanism uses a biochemical pump to concentrate CO(2) to levels up to 10-fold atmospheric in specialized cells of the leaf where Rubisco, the primary enzyme of C(3) photosynthesis, is located. The basic biochemical pathways underlying this process, discovered more tha...
متن کاملMolecular evolution and genetic engineering of C4 photosynthetic enzymes.
The majority of terrestrial plants, including many important crops such as rice, wheat, soybean, and potato, are classified as C(3) plants that assimilate atmospheric CO(2) directly through the C(3) photosynthetic pathway. C(4) plants, such as maize and sugarcane, evolved from C(3) plants, acquiring the C(4) photosynthetic pathway in addition to the C(3) pathway to achieve high photosynthetic p...
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I compared the C(4) grass flora and climatic records for 32 sites in the United States. Consistent with previous studies, I found that the proportion of the grass flora that uses the NADP malic enzyme (NADP-ME) variant of C(4) photosynthesis greatly increases with increasing annual precipitation, while the proportion using the NAD malic enzyme (NAD-ME) variant (and also the less common phosphoe...
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Four species of the genus Flaveria, namely F. anomala, F. liaris, F. pubescens, and F. ramosissima, were identified as intermediate C3-C4 plants based on leaf anatomy, photosynthetic CO2 compensation point, 02 inhibition of photosynthesis, and activities of C4 enzymes. F. anomala and F. rawosissina exhibit a distinct Kranz-like leaf anatomy, similar to that of the C4 species F. trinervia while ...
متن کاملOverproduction of C4 photosynthetic enzymes in transgenic rice plants: an approach to introduce the C4-like photosynthetic pathway into rice.
Four enzymes, namely, the maize C(4)-specific phosphoenolpyruvate carboxylase (PEPC), the maize C(4)-specific pyruvate, orthophosphate dikinase (PPDK), the sorghum NADP-malate dehydrogenase (MDH), and the rice C(3)-specific NADP-malic enzyme (ME), were overproduced in the mesophyll cells of rice plants independently or in combination. Overproduction individually of PPDK, MDH or ME did not affec...
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ژورنال
عنوان ژورنال: Journal of Experimental Botany
سال: 2011
ISSN: 0022-0957,1460-2431
DOI: 10.1093/jxb/err080