Responses of leaf growth and gas exchanges to salt stress during reproductive stage in wild wheat relative Aegilops geniculata Roth. and wheat (Triticum durum Desf.)
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- 作者：Khaled Mguis (1) (2) (3)
Ali Albouchi (1)
Mejda Abassi (1)
Ayda Khadhri (4)
Mbarka Ykoubi-Tej (4)
Asma Mahjoub (2)
Nadia Ben Brahim (2)
Zeineb Ouerghi (3) - 关键词：Aegilops geniculata ; Growth ; Gas exchanges ; Salinity ; Triticum durum
- 刊名：Acta Physiologiae Plantarum
- 出版年：2013
- 出版时间：May 2013
- 年：2013
- 卷：35
- 期：5
- 页码：1453-1461
- 全文大小：470KB
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Ali Albouchi (1)
Mejda Abassi (1)
Ayda Khadhri (4)
Mbarka Ykoubi-Tej (4)
Asma Mahjoub (2)
Nadia Ben Brahim (2)
Zeineb Ouerghi (3)
1. Unit茅 d鈥橝grosylvopastoralisme, INRGREF, Rue Hedi Karray, 2080, Ariana, Tunisia
2. Laboratoire de Botanique, INRAT, Rue Hedi Karray, 2080, Ariana, Tunisia
3. Unit茅 de Physiologie et Biochimie de la tol茅rance aux sels des plantes, D茅partement de Biologie FST, FST, Universit茅 de Tunis El Manar, 2092, Tunis, Tunisia
4. D茅partement de biologie FST, FST, Universit茅 de Tunis El Manar, Campus Universitaire, 1060, Tunis, Tunisia
文摘
In order to investigate the effect of salinity on the growth and photosynthesis of the wild wheat and wheat, three accessions of Aegilops geniculata from Ain Zana, Zaghouan and Sbitla and one variety of durum wheat (Triticum durum) were grown in the INRAT greenhouse and treated with different salinity levels. The growth of leaves, water status and gas exchange parameters have been measured at the reproductive stage. The flag leaf length, total leaf dry weight, water status, CO2 assimilation rate, stomatal conductance, intercellular CO2 and transpiration for the three Ae. geniculata accessions and wheat variety significantly decreased with increasing salt. The decline in photosynthesis measured in response to salt stress was proportionally greater than the declines in transpiration, resulting in a reduction of water-use efficiency, at both the leaf and whole-plant levels. Among the factors inhibiting photosynthetic activity, those of a stomatal nature had a greater effect. This study has shown a high degree of variation of these characters mainly related to geographical origin. It was observed also that Sbitla accession was less affected by the imposed salt stress than all the others while Ain Zana was the most affected one.