منابع مشابه
C4 photosynthesis
The question then is how the same neurons convey two different sorts of information. The answer is that motor giants are capable of generating two types of action potentials, small/slow calcium spikes and large/fast sodium spikes, depending on the degree of depolarization it receives. As opposed to the input from the ring giant, the input from the pacemaker is too low to trigger the sodium spik...
متن کاملC4 cycles: past, present, and future research on C4 photosynthesis.
In the late 1960s, a vibrant new research field was ignited by the discovery that instead of fixing CO(2) into a C(3) compound, some plants initially fix CO(2) into a four-carbon (C(4)) compound. The term C(4) photosynthesis was born. In the 20 years that followed, physiologists, biochemists, and molecular and developmental biologists grappled to understand how the C(4) photosynthetic pathway w...
متن کاملThe inevitability of C4 photosynthesis
Elements of C4 photosynthesis-a complex adaptation that increases photosynthetic efficiency-may have evolved first to correct an intercellular nitrogen imbalance, and only later evolved a central role in carbon fixation.
متن کاملC4 Photosynthesis: Differentiating Causation and Coincidence
Determination of the historical causes of organismal adaptations is difficult, but a recent study has suggested that at least one of the transitions to C(4) photosynthesis was directly facilitated by changes in atmospheric CO(2) levels. But what about the other 50+ origins of C(4)?
متن کاملPhotorespiration connects C3 and C4 photosynthesis.
C4 plants evolved independently more than 60 times from C3 ancestors. C4 photosynthesis is a complex trait and its evolution from the ancestral C3 photosynthetic pathway involved the modification of the leaf anatomy and the leaf physiology accompanied by changes in the expression of thousands of genes. Under high temperature, high light, and the current CO2 concentration in the atmosphere, the ...
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ژورنال
عنوان ژورنال: Annals of Botany
سال: 2008
ISSN: 0305-7364,1095-8290
DOI: 10.1093/aob/mcn093