Physiological characterization of leaf senescence of Jatropha curcas L. populations

被引:16
作者
Matos, Fabio Santos [1 ]
de Oliveria, Lucimar Rodrigues
de Freitas, Ricardo Galvao
Evaristo, Anderson Barbosa
Missio, Robson Fernando [2 ]
Oliva Cano, Marco Antonio [3 ]
dos Santos Dias, Luiz Antonio [4 ]
机构
[1] State Univ Goias, Unit Ipameri, Univ Sect, BR-75780000 Ipameri, Go, Brazil
[2] Univ Fed Parana, Palotina, PR, Brazil
[3] Univ Fed Vicosa, Dept Plant Biol, Vicosa, MG, Brazil
[4] Univ Fed Vicosa, Dept Plant Sci, Vicosa, MG, Brazil
关键词
Temperature; Photosynthesis; Leaf; Senescence; Biofuel; Diversity; NITRATE REDUCTASE; CHLOROPHYLL-A; PHOTOSYNTHESIS; FLUORESCENCE; RESPONSES; NITROGEN; LEAVES; ASSAY;
D O I
10.1016/j.biombioe.2012.05.012
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
The objective of this paper was to assess and identify the causes of senescence in Jatropha curcas L. plants. Morphological, physiological and agricultural parameters in non-irrigated and daily irrigated plants by drip irrigation system were evaluated. The characteristics evaluated were soil humidity, the number of leafs, rate of branches growth, increase of branches diameter, relative water content, photosynthesis, transpiration, stomatal conductance, internal CO2 concentration/environment ratio, nitrogen content, specific leaf area, carotenoids, total chlorophyll, chlorophyll/carotenoids ratio, a/b chlorophyll ratio, total chlorophyll/nitrogen ratio, maximum and minimum air temperature, temperature range and nitrate reductase activity. We used four wild populations of 4-year old J. curcas. The evaluations were conducted every 10 days, between 7 a.m. and 11 a.m. The four populations assessed had the same behavior regarding the leaf senescence, acting uniformly regarding the reactions regulating their development. The photosynthetic activity, chlorophyll content, nitrate reductase activity, vegetative growth and nitrogen content were reduced during senescence. The little variation in day length, appropriate concentration of nitrogen in leaves and high soil water potential throughout the experiment suggest that these variables were not determining to trigger senescence. However, the reduced minimum temperature and the increased thermal range seemed to be determinant for the occurrence of leaf senescence. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:57 / 64
页数:8
相关论文
共 30 条
  • [1] Ackerly DD, 2000, BIOSCIENCE, V50, P979, DOI 10.1641/0006-3568(2000)050[0979:TEOPET]2.0.CO
  • [2] 2
  • [3] Induction of leaf senescence by low nitrogen nutrition in sunflower (Helianthus annuus) plants
    Agueera, Eloisa
    Cabello, Purificacion
    de la Haba, Purificacion
    [J]. PHYSIOLOGIA PLANTARUM, 2010, 138 (03) : 256 - 267
  • [4] Arruda FP, 2004, J OIL FIBER, V8, P789
  • [5] Beltrao NEM, 2006, GEN CONSIDERATIONS J, V1, P1
  • [6] ANALYSIS BY DIGESTION AND COLORIMETRIC ASSAY OF TOTAL NITROGEN IN PLANT-TISSUES HIGH IN NITRATE
    CATALDO, DA
    SCHRADER, LE
    YOUNGS, VL
    [J]. CROP SCIENCE, 1974, 14 (06) : 854 - 856
  • [7] RAPID COLORIMETRIC DETERMINATION OF NITRATE IN PLANT-TISSUE BY NITRATION OF SALICYLIC-ACID
    CATALDO, DA
    HAROON, M
    SCHRADER, LE
    YOUNGS, VL
    [J]. COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, 1975, 6 (01) : 71 - 80
  • [8] DIAS L. A. S., 2008, SISTEMAS AGROSSILVIP, P283
  • [9] Dias LAdS, 2007, CULTIVO MANSO JATROP, V1, P1
  • [10] Photostasis and cold acclimation: sensing low temperature through photosynthesis
    Ensminger, I
    Busch, F
    Huner, NPA
    [J]. PHYSIOLOGIA PLANTARUM, 2006, 126 (01) : 28 - 44