A study on the evaluation of waterlogging tolerance of Different dactylis glomerata l. germplasm resources and the difference in root microstructure under waterlogging stress | [Pakistan Journal of Botany • 2021]

Author(s):

1. YIN-CHEN WANG: Animal Husbandry and Veterinary Research Institute of Guizhou Provincial Academy of Agricultural Sciences, Guiyang 550000, China; College of Animal Science and Technology, Southwest University, Rongchang 402460, China

2. JING-XIN MAO: College of Animal Science and Technology, Southwest University, Rongchang 402460, China; Chongqing University of Science & Technology, Chongqing 401331, China

3. SHAO-QING WANG: FuJian Aonong Biological Technology Group Inc.,FuJian 363000,China

4. YANG YUAN: Animal Husbandry and Veterinary Research Institute of Guizhou Provincial Academy of Agricultural Sciences,Guiyang 550000,China

5. YAN FAN: Chongqing Academy of Animal Science,Rongchang 402460,China

6. JIAN ZHANG: Chongqing Academy of Animal Science,Rongchang 402460,China

7. LIN-FENG JIANG: Chongqing Animal Husbandry Technology Extension Station,Chongqing 401121,China

8. MIN-YANG LI: College of Animal Science and Technology, Southwest University,Rongchang 402460,China

9. XING-YUN YANG: College of Animal Science and Technology, Southwest University,Rongchang 402460,China

10. JIN-HUA ZHANG: Animal Husbandry and Veterinary Research Institute of Guizhou Provincial Academy of Agricultural Sciences,Guiyang 550000,China

11. BING ZENG: College of Animal Science and Technology, Southwest University,Rongchang 402460,China

Abstract:

In order to characterize the physiological mechanisms of waterlogging tolerance of Dactylis glomerata L. and to help rationally select waterlogging-tolerant species to alleviate the waterlogging damage to agricultural production, effects of waterlogging on the growth, morphological indexes, physiological changes and root microstructure of Dactylis glomerata L. were studied. A total of 20 varieties (lines) of Dactylis glomerata L. from different areas were flooded treatment for 0 day and 28 days, respectively. Morphological indexes and physiological indexes of 20 Dactylis glomerata L. resources were evaluated under waterlogging stress comprehensively. In addition, paraffin section technology was used for observing the microstructure changes on root of 6 types of Dactylis glomerata L. under waterlogging stress for 0 day, 14 days and 28 days respectively. Our results demonstrated that the orders of 20 Dactylis glomerata L. resources by ability of waterlogging tolerance were „Dianbei? > „Cambria? > „Aldebaran? > „Athos? > „Donata? > „Sparta?> „PI 231482? >„Endurance? > „PI 598418? > „02-114? > „PI 311388? > „01472? > „PG28? > „Glorus Sweden? = „PI593995?> „Smithii PI 441032? = „PI594994? > „Geneal Belgnaio? > „PG49? > „Amba?. What?s more, with the extension of waterlogging stress time, the number/size of vessel and the diameter of vascular cylinder were significantly (P<0.05) reduced. Cells ruptured and structure collapsed were found in the root microstructure of „PI 594994?, „Geneal Belgnaio?, „PG 49? while structurallycomplete of root in „Dianbei?, „Cambria?, „Aldebaran? for under waterlogging stress 28 days. Therefore, they could be used as the key selection accessions and studied on their genes of waterlogging tolerance for further research.

Page(s): 1583-1592

DOI: 10.30848/PJB2021-5(8)

Published: Journal: Pakistan Journal of Botany, Volume: 53, Issue: 5, Year: 2021

Keywords:

physiological changes , Microstructure , Morphological changes , Waterlogging tolerance , Dactylis glomerata L

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