Protection and storage of chlorophyll in overwintering evergreens

被引:142
作者
Gilmore, AM [1 ]
Ball, MC
机构
[1] Australian Natl Univ, Res Sch Biol Sci, Inst Adv Studies, Photobioenerget Grp, Canberra, ACT 0200, Australia
[2] Australian Natl Univ, Res Sch Biol Sci, Inst Adv Studies, Ecosyst Dynam Grp, Canberra, ACT 0200, Australia
关键词
D O I
10.1073/pnas.150237697
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
How evergreen species store and protect chlorophyll during exposure to high light in winter remains unexplained. This study reveals that the evergreen snow gum (Eucalyptus pauciflora Sieb. ex Spreng.) stores and protects its chlorophylls by forming special complexes that are unique to the winter-acclimated state. Our in vivo spectral and kinetic characterizations reveal a prominent component of the chlorophyll fluorescence spectrum around 715 nm at 77 K. This band coincides structurally with a loss of chlorophyll end an increase in energy-dissipating carotenoids. Functionally, the band coincides with an increased capacity to dissipate excess light energy, absorbed by the chlorophylls, as heat without intrathylakoid acidification. The increased heat dissipation helps protect the chlorophylls from photo-oxidative bleaching and thereby facilitates rapid recovery of photosynthesis in spring.
引用
收藏
页码:11098 / 11101
页数:4
相关论文
共 28 条
  • [1] ADAMS WW, 1990, PLANTA, V180, P166, DOI 10.1007/BF00193991
  • [2] RESOLVABILITY OF FLUORESCENCE LIFETIME DISTRIBUTIONS USING PHASE FLUOROMETRY
    ALCALA, JR
    GRATTON, E
    PRENDERGAST, FG
    [J]. BIOPHYSICAL JOURNAL, 1987, 51 (04) : 587 - 596
  • [3] Microclimate above grass adversely affects spring growth of seedling snow gum (Eucalyptus pauciflora)
    Ball, MC
    Egerton, JJG
    Leuning, R
    Cunningham, RB
    Dunne, P
    [J]. PLANT CELL AND ENVIRONMENT, 1997, 20 (02) : 155 - 166
  • [4] GLOBAL RESOLUTION OF HETEROGENEOUS DECAY BY PHASE MODULATION FLUOROMETRY - MIXTURES AND PROTEINS
    BEECHEM, JM
    KNUTSON, JR
    ROSS, JBA
    TURNER, BW
    BRAND, L
    [J]. BIOCHEMISTRY, 1983, 22 (26) : 6054 - 6058
  • [5] FLUORESCENCE QUENCHING IN PHOTOSYSTEM-II OF CHLOROPLASTS
    BUTLER, WL
    KITAJIMA, M
    [J]. BIOCHIMICA ET BIOPHYSICA ACTA, 1975, 376 (01) : 116 - 125
  • [6] Carotenoids .3. In vivo functions of carotenoids in higher plants
    DemmigAdams, B
    Gilmore, AM
    Adams, WW
    [J]. FASEB JOURNAL, 1996, 10 (04) : 403 - 412
  • [7] THE PSII-S PROTEIN OF HIGHER-PLANTS - A NEW-TYPE OF PIGMENT-BINDING PROTEIN
    FUNK, C
    SCHRODER, WP
    NAPIWOTZKI, A
    TJUS, SE
    RENGER, G
    ANDERSSON, B
    [J]. BIOCHEMISTRY, 1995, 34 (35) : 11133 - 11141
  • [8] Gilmore AM, 1999, CONCEPTS IN PHOTOBIOLOGY, P513
  • [9] XANTHOPHYLL CYCLE-DEPENDENT QUENCHING OF PHOTOSYSTEM-II CHLOROPHYLL-A FLUORESCENCE - FORMATION OF A QUENCHING COMPLEX WITH A SHORT FLUORESCENCE LIFETIME
    GILMORE, AM
    HAZLETT, TL
    GOVINDJEE
    [J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1995, 92 (06) : 2273 - 2277
  • [10] Quantitative analysis of the effects of intrathylakoid pH and xanathophyll cycle pigments on chlorophyll a fluorescence lifetime distributions and intensity in thylakoids
    Gilmore, AM
    Shinkarev, VP
    Hazlett, TL
    Govindjee
    [J]. BIOCHEMISTRY, 1998, 37 (39) : 13582 - 13593