Acclimation of photosynthesis to increasing atmospheric COz: The gas exchange perspective (Record no. 45545)

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control field 20250625140648.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-11323
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245 10 - TITLE STATEMENT
Title Acclimation of photosynthesis to increasing atmospheric COz: The gas exchange perspective
490 0# - SERIES STATEMENT
Volume/sequential designation Photosynthesis Research, 39, p.351-368, 1994
520 3# - SUMMARY, ETC.
Summary, etc. The nature of photosynthetic acclimation to elevated CO 2 is evaluated from the results of over 40 studies focusing on the effect of long-term CO 2 enrichment on the short-term response of photosynthesis to intercellular CO 2 (the A/C i response). The effect of CO 2 enrichment on the A/C i response was dependent on growth conditions, with plants grown in small pots (< 5 L)or low nutrients usually exhibiting a reduction of A at a given C i, while plants grown without nutrient deficiency in large pots or in the field tended to exhibit either little reduction or an enhancement of A at a given C i following a doubling or tripling of atmospheric CO 2 during growth. Using theoretical interpretations of A/Ci curves to assess acclimation, it was found that when pot size or nutrient deficiency was not a factor, changes in the shape of A/C i curves which are indicative of a reallocation of resources within the photosynthetic apparatus typically were not observed. Long-term CO 2 enrichment usually had little effect or increased the value of A at all C i. However, a minority of species grown at elevated CO 2 exhibited gas exchange responses indicative of a reduced amount of Rubisco and an enhanced capacity to metabolize photosynthetic products. This type of response was considered beneficial because it enhanced both photosynthetic capacity at high CO 2 and reduced resource investment in excessive Rubisco capacity. The ratio of intercellular to ambient CO2 (the Ci/C a ratio)was used to evaluate stomatal acclimation. Except under water and humidity stress, C~/C a exhibited no consistent change in a variety of C 3 species, indicating no stomatal acclimation. Under drought or humidity stress, Ci/C a declined in high-CO 2 grown plants, indicating stomata will become more conservative during stress episodes in future high CO 2 environments.
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element CO 2 ENRICHMENT
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element GAS EXCHANGE
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element GREENHOUSE EFFECT
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element PHOTOSYNTHESIS
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element RESPONSES TO CO 2
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Sage, R.F.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1U8DHyWDFLmMqozA88e0HKqQREC0oAreA/view?usp=drivesdk">https://drive.google.com/file/d/1U8DHyWDFLmMqozA88e0HKqQREC0oAreA/view?usp=drivesdk</a>
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