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- W429871260 endingPage "529" @default.
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- W429871260 abstract "Products of photosynthesis (reduced carbon, typically in the form of sugars), synthesized by a plant’s mature source leaves, are exported to the plant’s sinks for growth, storage, and/or maintenance respiration. When the rate of sugar production in source leaves exceeds the rate of export (often as a result of insufficient sink activity), sugars and starch accumulate in source leaves. In a feedback response, levels of messenger RNAs, coding for various photosynthetic proteins, of source leaves are repressed along with the levels of these proteins. Furthermore, the overall capacity for photosynthetic CO2 fixation is also decreased. Consequently, these source leaves with decreased rates of photosynthetic electron transport utilize a lessened fraction of the light they absorb for photochemistry, and should thus increase the level of thermal dissipation of (excess) absorbed light. Thermal dissipation can be assessed as increased non-photochemical quenching (NPQ) of chlorophyll fluorescence, as well as decreased intrinsic photosystem II (PS II) efficiency, the ratio of variable to maximal chlorophyll fluorescence Fv/Fm (in darkness) or F v ′ /F m ′ (in the light) (Fv being Fm – Fo; where v stands for variable, m for maximum, and o for minimum). Greater source activity relative to sink activity within the whole plant, resulting in starch and/or sugar accumulation, indeed leads to increases in thermal dissipation and in the concentration of zeaxanthin, a xanthophyll involved in thermal dissipation. Under severe conditions, high zeaxanthin levels, high thermal energy dissipation, and low PS II efficiency in source leaves become locked-in as part of a state of chronic photoinhibition associated with high foliar levels of sugar and starch. A correlation between photoinhibition and foliar non-structural carbohydrate accumulation is a common occurrence. In this chapter, we discuss various potential underlying causes for this correlation, including the possibility that reduced growth of plants under stress conditions leads to sink limitation, foliar starch and sugar accumulation, and photoinhibition as a manifestation of photosynthetic repression under excess light." @default.
- W429871260 created "2016-06-24" @default.
- W429871260 creator A5058253826 @default.
- W429871260 creator A5066957717 @default.
- W429871260 creator A5082933166 @default.
- W429871260 date "2014-01-01" @default.
- W429871260 modified "2023-10-16" @default.
- W429871260 title "Photosystem II Efficiency and Non-Photochemical Fluorescence Quenching in the Context of Source-Sink Balance" @default.
- W429871260 cites W134127689 @default.
- W429871260 cites W135709934 @default.
- W429871260 cites W1480099715 @default.
- W429871260 cites W1485760291 @default.
- W429871260 cites W15194242 @default.
- W429871260 cites W1524873139 @default.
- W429871260 cites W1558915587 @default.
- W429871260 cites W1584269659 @default.
- W429871260 cites W1821968258 @default.
- W429871260 cites W1964380262 @default.
- W429871260 cites W1964393777 @default.
- W429871260 cites W1967086440 @default.
- W429871260 cites W1970291254 @default.
- W429871260 cites W1973104206 @default.
- W429871260 cites W1973393347 @default.
- W429871260 cites W1973630771 @default.
- W429871260 cites W1973808283 @default.
- W429871260 cites W1973847797 @default.
- W429871260 cites W1975351372 @default.
- W429871260 cites W1976472767 @default.
- W429871260 cites W1977173414 @default.
- W429871260 cites W1979157074 @default.
- W429871260 cites W1979733283 @default.
- W429871260 cites W1979872752 @default.
- W429871260 cites W1982081109 @default.
- W429871260 cites W1983679513 @default.
- W429871260 cites W1988927881 @default.
- W429871260 cites W1989178656 @default.
- W429871260 cites W1989579111 @default.
- W429871260 cites W1991283122 @default.
- W429871260 cites W1992244454 @default.
- W429871260 cites W1993563683 @default.
- W429871260 cites W1994348937 @default.
- W429871260 cites W1994394878 @default.
- W429871260 cites W1996746474 @default.
- W429871260 cites W1996881987 @default.
- W429871260 cites W1998302598 @default.
- W429871260 cites W2002235500 @default.
- W429871260 cites W2008313499 @default.
- W429871260 cites W2010609977 @default.
- W429871260 cites W2013609352 @default.
- W429871260 cites W2014650429 @default.
- W429871260 cites W2018653390 @default.
- W429871260 cites W2019080509 @default.
- W429871260 cites W2021970131 @default.
- W429871260 cites W2026138561 @default.
- W429871260 cites W2027115096 @default.
- W429871260 cites W2027136714 @default.
- W429871260 cites W2027699497 @default.
- W429871260 cites W2028979309 @default.
- W429871260 cites W2030274299 @default.
- W429871260 cites W2034484397 @default.
- W429871260 cites W2035947281 @default.
- W429871260 cites W2037398548 @default.
- W429871260 cites W2039417391 @default.
- W429871260 cites W2040475753 @default.
- W429871260 cites W2043006453 @default.
- W429871260 cites W2046921575 @default.
- W429871260 cites W2048730063 @default.
- W429871260 cites W2050877845 @default.
- W429871260 cites W2051965323 @default.
- W429871260 cites W2053424727 @default.
- W429871260 cites W2054900427 @default.
- W429871260 cites W2056007311 @default.
- W429871260 cites W2056247311 @default.
- W429871260 cites W2059949401 @default.
- W429871260 cites W2060986439 @default.
- W429871260 cites W2061439337 @default.
- W429871260 cites W2066003314 @default.
- W429871260 cites W2066458806 @default.
- W429871260 cites W2067719556 @default.
- W429871260 cites W2068662385 @default.
- W429871260 cites W2073441001 @default.
- W429871260 cites W2074280830 @default.
- W429871260 cites W2077735784 @default.
- W429871260 cites W2079236307 @default.
- W429871260 cites W2083069249 @default.
- W429871260 cites W2084199927 @default.
- W429871260 cites W2085257069 @default.
- W429871260 cites W2089415472 @default.
- W429871260 cites W2090901610 @default.
- W429871260 cites W2093099769 @default.
- W429871260 cites W2094510589 @default.
- W429871260 cites W2097217685 @default.
- W429871260 cites W2097935993 @default.
- W429871260 cites W2098578977 @default.
- W429871260 cites W2108999509 @default.
- W429871260 cites W2110339504 @default.
- W429871260 cites W2113582623 @default.
- W429871260 cites W2114078547 @default.