Leaf anatomy explains the strength of C4 activity within the grass species Alloteropsis semialata.
Leaf anatomy explains the strength of C4 activity within the grass species Alloteropsis semialata.
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叶子解剖学解释了草种 Alloteropsis semialata 内 C4 活性的强度。
DOI:
10.1111/pce.14607
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Alenazi AS
中科院分区:
文献类型:
--
作者:
Alenazi AS
C4photosynthesis results from anatomical and biochemical characteristics that together concentrate CO2around ribulose‐1,5‐bisphosphate carboxylase/oxygenase (Rubisco), increasing productivity in warm conditions. This complex trait evolved through the gradual accumulation of components, and particular species possess only some of these, resulting in weak C4activity. The consequences of adding C4components have been modelled and investigated through comparative approaches, but the intraspecific dynamics responsible for strengthening the C4pathway remain largely unexplored. Here, we evaluate the link between anatomical variation and C4activity, focusing on populations of the photosynthetically diverse grassAlloteropsis semialatathat fix various proportions of carbon via the C4cycle. The carbon isotope ratios in these populations range from values typical of C3to those typical of C4plants. This variation is statistically explained by a combination of leaf anatomical traits linked to the preponderance of bundle sheath tissue. We hypothesize that increased investment in bundle sheath boosts the strength of the intercellular C4pump and shifts the balance of carbon acquisition towards the C4cycle. Carbon isotope ratios indicating a stronger C4pathway are associated with warmer, drier environments, suggesting that incremental anatomical alterations can lead to the emergence of C4physiology during local adaptation within metapopulations.
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影响因子:
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作者:
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通讯作者:
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DOI:
10.1002/joc.5086
发表时间:
2017-10-01
期刊:
INTERNATIONAL JOURNAL OF CLIMATOLOGY
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