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2015 | 37 | 10 |

Tytuł artykułu

Survival strategies of Ammopiptanthus mongolicus and Zygophyllum xanthoxylon in saline and drought environments, northwest China

Autorzy

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
Ammopiptanthus mongolicus and Zygophyllum xanthoxylon are typical plants in the West Ordos National Natural Reserve of Inner Mongolia, China. The populations of A. mongolicus had few young individuals and senesced. However, Z. xanthoxylon was growing well in the habitat of A. mongolicus. In addition, there is little information to compare their seed germination and seedling growth under combined salt and drought environments. In order to exploring the reason for the actuality, a study was conducted to quantify the interactive effects of salinity and drought stresses on seed germination and seedling growth of A. mongolicus and Z. xanthoxylon and then to compare the survival strategies of both shrubs. The experiment consisted of seven gradient concentrations of salinity (0, 0.3, 0.6, 0.9, 1.2, 1.5 and 1.8 % NaCl) in each of the six drought stress levels (0, -0.2, -0.4, -0.8, -1.6 and -2.0 Mpa polyethylene glycol). As expected, combined salinity and drought stresses had significant (P\0.05) interactive effects on seed germination of the two tested shrubs. There was significant decrease in these indices, in response to increased salt and/or drought stresses. The higher germination rate and shorter germination duration were detected for A. mongolicus, which may lead to the loss of seed bank. In addition, the radicle length of A. mongolicus (0–2.3 cm) was shorter than that of Z. xanthoxylon (0–14.6 cm), indicating less resistance of seedlings to the volatile conditions in the surface of arid soil. The stepwise regression analysis showed that salinity was the dominant influencing factor and followed by drought in seed germination and seedling growth under salt–drought mixed stress.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

37

Numer

10

Opis fizyczny

Article: 213 [ 8 p.], fig.,ref.

Twórcy

autor
  • Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China
  • Shenzhen Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China
  • School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
autor
  • Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China
  • Shenzhen Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China
  • School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
autor
  • Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China
  • School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
autor
  • Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China
  • Shenzhen Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China
  • School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
autor
  • Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China
  • School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China

Bibliografia

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Typ dokumentu

Bibliografia

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Identyfikator YADDA

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