Chin J Plan Ecolo ›› 2013, Vol. 37 ›› Issue (2): 111-121.doi: 10.3724/SP.J.1258.2013.00012

• Research Articles • Previous Articles     Next Articles

Comparison of light response models of photosynthesis in leaves of Periploca sepium under drought stress in sand habitat formed from seashells

  

  1. 1College of Forestry, Shandong Agricultural University, Taian, Shandong 271018, China;

    2Shandong Provincial Key Laboratory of Eco-Environmental Science for Yellow River Delta, Binzhou University, Binzhou, Shandong 256603, China;

    3College of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China
  • Received:2012-11-13 Revised:2012-12-18 Online:2013-01-31 Published:2013-02-01
  • Contact: XIA Jiang-Bao E-mail:xiajb@163.com

Abstract:

Aims Our objectives were to find the optimal models for different drought stresses by comparing four light response models of photosynthesis in leaves of Periploca sepium growing in sand formed from seashells, investigate the adaptability law of parameters of light response models to drought stresses, and define the adaptability of P. sepium to the shell sand moisture conditions.
Methods We used three-year-old P. sepium grown in shell ridge island of China’s Yellow River Delta as experimental material, set up four moisture conditions simulating those in shell sand, measured light responses of photosynthesis in leaves of P. sepium under different drought stresses using CIRAS-2 portable photosynthesis system, and fitted and analyzed the light response curves by four models: rectangular hyperbola, non-rectangular hyperbola, exponential and modified rectangular hyperbola.
Important findings The sequence of fitting effect of the four light response models was in descending order: modified rectangular hyperbola model > non-rectangular hyperbola model > exponential model > rectangular hyperbola model. This result was related to the latter three models not having extreme values, not fitting the process of light response curve declining after light saturation point (LSP), and not directly and accurately solving maximum net photosynthetic rate (Pnmax) and LSP. Among them, the non-rectangular hyperbola model best fit dark respiration rate (Rd), the rectangular hyperbola model best fit light compensation point (LCP) and modified rectangular hyperbola model best fit Pnmax and LSP. The adaptabilities of the four models to different drought stresses varied. The modified rectangular hyperbola model well fit the curves under all the drought stresses, the rectangular hyperbola model and exponential model suited mild drought stress and the non-rectangular hyperbola model suited severe drought stress. The light response parameters, including apparent quantum yield (AQY), Rd, LCP, Pnmax and LSP, responded to drought stresses differently. AQY, Rd and LCP first increased and then decreased with the aggravation of drought stress, while Pn, Pnmax and LSP decreased gradually. LSP decreased by 5.2%, 16.3% and 34.55% under light stress, moderate stress and severe stress, respectively, in comparison to the control (1 556 μmol·m–2·s–1). Pnmax decreased by 17.8%, 39.0% and 59.0% compared to the control (22.58 μmol·m–2·s–1). Light use capability of P. sepium leaf was strongest and light ecological amplitude (1 520 μmol·m–2·s–1) was widest under sufficient water condition; photo-saturation and photo-inhibition occurred significantly, light use capability weakened, and photosynthetic capacity was inhibited seriously under severe stress.

CLC Number: 

  • null
[1] WU Qi-Qian, WU Fu-Zhong, YANG Wan-Qin, XU Zhen-Feng, HE Wei, HE Min, ZHAO Ye-Yi, and ZHU Jian-Xiao. Effect of seasonal snow cover on litter decomposition in alpine forest [J]. Chin J Plan Ecolo, 2013, 37(4): 296-305.
[2] WANG Lin, FENG Jin-Xia, and WAN Xian-Chong. Effects of soil thickness on dry-season water relations and growth in Robinia pseudoacacia [J]. Chin J Plan Ecolo, 2013, 37(3): 248-255.
[3] YIN Hai-Long and TIAN Chang-Yan. Effects of nitrogen regulation on photosystem II chlorophyll fluorescence characteristics of functional leaves in sugar beet (Beta vulgaris) under salt environment [J]. Chin J Plan Ecolo, 2013, 37(2): 122-131.
[4] HU Hai-Qing, WEI Shu-Jing, and SUN Long. Estimation of carbon emissions due to forest fire in Daxing’an Mountains from 1965 to 2010 [J]. Chin J Plan Ecolo, 2012, 36(7): 629-644.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] Zhang Zhen-jue. Some Principles Governing Shedding of Flowers and Fruits in Vanilla fragrans[J]. Chin Bull Bot, 1985, 3(05): 36 -37 .
[2] Qian Gao;Yuying Liu;Yinan Fei;Dapeng Li;Xianglin Liu* . Research Advances into the Root Radial Patterning Gene SHORT-ROOT[J]. Chin Bull Bot, 2008, 25(03): 363 -372 .
[3] Wang Bao-shan;Zou Qi and Zhao Ke-fu. Advances in Mechanism of Crop Salt Tolerance and Strategies for Raising Crop Salt Tolerance[J]. Chin Bull Bot, 1997, 14(增刊): 25 -30 .
[4] HE Feng WU Zhen-Bin. Application of Aquatic Plants in Sewage Treatment and Water Quality Improvement[J]. Chin Bull Bot, 2003, 20(06): 641 -647 .
[5] JIA Hu-Sen LI De-QuanHAN Ya-Qin. Cytochrome b-559 in Chloroplasts[J]. Chin Bull Bot, 2001, 18(02): 158 -162 .
[6] Wei Sun;Chonghui Li;Liangsheng Wang;Silan Dai*. Analysis of Anthocyanins and Flavones in Different-colored Flowers of Chrysanthemum[J]. Chin Bull Bot, 2010, 45(03): 327 -336 .
[7] . Phosphate_Stress Protein and Iron_Stress Protein in Plants[J]. Chin Bull Bot, 2001, 18(05): 571 -576 .
[8] ZHANG Da-Yong, JIANG Xin-Hua. An Ecological Perspective on Crop Prduction[J]. Chin J Plan Ecolo, 2000, 24(3): 383 -384 .
[9] Gui Ji-xun, Zhu Ting-cheng. Study of Energy Flow Between Litter and Decomposers in Aneurolepidium chinese Grassland[J]. Chin J Plan Ecolo, 1992, 16(2): 143 -148 .
[10] YAN Xiu-Feng. Ecology of Plant secondary Metabolism[J]. Chin J Plan Ecolo, 2001, 25(5): 639 -640 .