Comprehensive Evaluation of Drought Stress Tolerance of Twenty Species of Lettuce at the Seed Germination Stage during PEG 6000 Stress

DOI

10.2991/bst-17.2018.46How to use a DOI?

Keywords

Lettuce, Drought stress, Cluster analysis.

Abstract

[Objective] The goal is to understand the drought tolerance of lettuce and effectively distinguish between cultivars that are drought tolerant and those that are drought sensitive. [Method] This study was performed to evaluate twenty lettuce cultivars for their sensitivity to drought stress induced by polyethylene glycol (PEG) 6000 at a concentration of 200 g/L during germination and the seedling growth stage of plant development. The final germination percentage, sprout potential and the relative germination rates and root lengths were measured during experimental conditions. Experimental units were arranged in a factorial completely randomized design with three replications. The data were used for principal component analysis, membership function analysis, and cluster analysis. [Result] The mean comparison showed that the cultivar 'American fast-growing No. 9' exhibited the highest value for most of the parameters recorded. The cultivar that was the most sensitive to drought was 'Victoria glass crispy lettuce'. [Conclusion] The results of the variance analysis clearly indicated that the combination of the germination and seedling growth parameters used in this study can serve to discriminate between tolerant and sensitive cultivars during drought stress in breeding programmers and that this type of laboratory experiment appears to be suitable to screen lettuce cultivars during drought stress.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Chao-Jie Liu
AU  - Yu-Lin Duan
AU  - Lin Wang
AU  - Ying-Yan Han
AU  - Jing-Hong Hao
AU  - Shuang-Xi Fan
PY  - 2018/02
DA  - 2018/02
TI  - Comprehensive Evaluation of Drought Stress Tolerance of Twenty Species of Lettuce at the Seed Germination Stage during PEG 6000 Stress
BT  - Proceedings of the 2017 2nd International Conference on Biological Sciences and Technology (BST 2017)
PB  - Atlantis Press
SP  - 292
EP  - 300
SN  - 2468-5747
UR  - https://doi.org/10.2991/bst-17.2018.46
DO  - 10.2991/bst-17.2018.46
ID  - Liu2018/02
ER  -