Endogenous Hormones Improve Lodging Tolerance of Maize (Zea mays L.) by Regulating Stalk Structure Under Elevated Temperature

Global warming is an irreversible trend. Maize hybrids responded differently to elevated temperature throughout the whole growth periods, but the underlying mechanisms are unclear, particularly from the early stalk growth stage that is used to adapt different environments. For this, two hybrids, Zhe...

Full description

Saved in:
Bibliographic Details
Published in:Journal of plant growth regulation 2024-02, Vol.43 (2), p.445-457
Main Authors: Wang, Jingjing, Li, Rongfa, Liu, Dongyao, Zhao, Wenlong, Miao, Zhengyan, Jia, Xucun, Dong, Pengfei, Wang, Qun
Format: Article
Language:English
Subjects:
Agriculture
Biomedical and Life Sciences
Climate change
Compressive strength
Corn
Epidermis
Global climate
Global warming
Growth stage
Heat resistance
High temperature
Hormones
Hybrids
Hypodermis
Life Sciences
Lodging
Plant Anatomy/Development
Plant Physiology
Plant Sciences
Plant tissues
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Global warming is an irreversible trend. Maize hybrids responded differently to elevated temperature throughout the whole growth periods, but the underlying mechanisms are unclear, particularly from the early stalk growth stage that is used to adapt different environments. For this, two hybrids, Zhengdan958 (heat-tolerant hybrid) and Xianyu335 (heat-sensitive hybrid), including control (CK), the whole growth period increased by 2 °C  (CK+2°C), and the whole growth period increased by 4 °C (CK+4°C). Compared to CK, the length of the third internode of CK+2°C and CK+4°C at 56 days after planting (DAP), increased on average by 6.91% and 19.20%, respectively. The elongation of internode in XY335 grew faster than in ZD958, and the third internode density of XY335 decreased more than that of ZD958 at 28 DAP. With temperature increasing, cell length elongated significantly, and cell layers decreased significantly under the CK+4°C and CK+2°C. Compared with CK, the total width of ground tissue cells, hypodermis cells and epidermis cell width of CK+4°C and CK+2°C decreased by 26.16%, 30.29%, 28.82%, and 18.57%, 24.39%, 17.11%, respectively. The major axe (R 1 ), minor axe (R 2 ), and length of the third internode were correlated negatively with ratios of IAA/ABA, ZR/ABA, and GA 3 /ABA. There was significantly positive relationship between total width of ground tissue cells and crushing strength, thrust resistance (p 
ISSN:0721-7595
1435-8107
DOI:10.1007/s00344-023-11098-6