| |
| DOI: | 10.11686/cyxb2022129 |
|---|
| Web URL(s): | http://cyxb.magtech.com.cn/CN/10.11686/cyxb2022129
Last checked: 06/19/2023 |
|---|
| Publication Type:
| Report |
|---|
| Author(s): | Yi-long, Zhang;
Qi-kun, Yu;
Wen, Li;
Pei-ying, Li;
Zong-jiu, Sun |
|---|
| Author Affiliation: | Yi-long, Qi-kun and Wen: College of Grassland Science, Xinjiang Agricultural University, Urumqi, China; Pei-ying and Zong-jiu: College of Grassland Science, Xinjiang Agricultural University, Urumqi, China and Key Laboratory of Grassland Resources and Ecology of Xinjiang, Urumqi, China and Key Laboratory of Grassland Resources and Ecology of Westen Arid Region, Urumqi, China |
|---|
| Title: | Aboveground and belowground pheotypic characteristics of Cynodon dactylon lines differing in drought resistance and endogenous hormone response to drought stress |
|---|
| Source: | [Caoye Xuebao] [Acta Prataculturae Sinica]. Vol. 32, No. 3, March 2023, p. 163-178. |
|---|
| Publishing Information: | [Lanzhou Shi, China]: ["Cao Ye Xue Bao" Bian Ji Wei Yuan Hui] |
|---|
| # of Pages: | 16 |
|---|
| Keywords: | Author-Supplied Keywords: Drought stress; Cynodon dactylon; Phenotypic characteristics; Endogenous hormone; Differentiated response strategy
|
|---|
| Abstract/Contents: | "This study investigated the effects of drought stress on Cynodon dactylon lines varying in drought resistance, in order to identify patterns in morphological and ecophysiological traits and endogenous hormone levels correlated with drought resistance. It was anticipated this research would enhance understanding of drought resistance in C. dactylon and thereby provide a theoretical basis for use of exogenous hormones to regulate drought resistance in industry practice. Plants were established in pots made from PVC pipes then subjected to predetermined levels of water deficit for 10 days. The relative water content, relative conductivity, endogenous hormones [indole acetic acid (IAA), abscisic acid (ABA), gibberellin A3 (GA3), zeatin riboside (ZR), brassinolide (Br)], leaf characteristics (leaf length, leaf width, leaf area), root characteristics (total root length, root surface area, root volume, root average diameter, root dry weight, longest root length and root activity) were measured. The changes in endogenous hormone levels in leaves and roots of C. dactylon with different drought resistance and the correlations between phenotypic characteristics and hormones were analyzed. The results showed that with increased intensity of drought stress, leaf length, leaf width, leaf area and root average diameter of both drought-tolerant and intolerant C. dactylon were reduced, while the growth and development of roots was promoted. The content of ABA in leaves and roots was increased, and the contents of IAA, GA3, ZR and Br were decreased, and IAA:ABA and GA3:IAA ratios were inversely correlated with leaf indexes and root indexes. This showed that the leaf and root systems of C. dactylon root adopted contrasting survival strategies under drought stress: promotion of underground growth and reduction in aboveground growth. Drought-resistant C. dactylon exhibited comparatively better adaption to a water deficit stress environment by maintaining some growth, larger leaf area, a more developed root system and higher ZR:ABA, GA3:ABA, IAA:ABA and Br:ABA ratios under the same level of water deficit stress." |
|---|
| Language: | Chinese |
|---|
| References: | 46 |
|---|
| Note: | Pictures, color
Tables
Graphs |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Y.-l., Zhang, Yu Q.-k., L. Wen, Li P.-y., and Sun Z.-j. 2023. Aboveground and belowground pheotypic characteristics of Cynodon dactylon lines differing in drought resistance and endogenous hormone response to drought stress. (In Chinese) [Caoye Xuebao] [Acta Prataculturae Sinica]. 32(3):p. 163-178. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=329446 |
| If there are problems with this record, send us feedback about record 329446. |
| Choices for finding the above item: |
|---|
| DOI: 10.11686/cyxb2022129 |
| Web URL(s):
http://cyxb.magtech.com.cn/CN/10.11686/cyxb2022129
Last checked: 06/19/2023 |
| 
MSU catalog number: b10289426 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
