loading page

Root cortical senescence enhances drought tolerance in cotton
  • +7
  • Liantao Liu,
  • Congcong Guo,
  • Ke Zhang,
  • Hongchun Sun,
  • Lingxiao Zhu,
  • Yongjiang Zhang,
  • Guiyan Wang,
  • Anchang Li,
  • Zhiying Bai,
  • Cundong Li
Liantao Liu
Hebei Agricultural University College of Agronomy

Corresponding Author:[email protected]

Author Profile
Congcong Guo
Hebei Agricultural University College of Agronomy
Author Profile
Ke Zhang
Hebei Agricultural University College of Agronomy
Author Profile
Hongchun Sun
Hebei Agricultural University College of Agronomy
Author Profile
Lingxiao Zhu
Hebei Agricultural University College of Agronomy
Author Profile
Yongjiang Zhang
Hebei Agricultural University College of Agronomy
Author Profile
Guiyan Wang
Hebei Agricultural University College of Agronomy
Author Profile
Anchang Li
Hebei Agricultural University College of Agronomy
Author Profile
Zhiying Bai
Hebei Agricultural University
Author Profile
Cundong Li
Hebei Agricultural University College of Agronomy
Author Profile

Abstract

The root cortex is an important anatomical phenes, and root cortical senescence (RCS) is closely associated with root absorptive function. However, characteristics and responses of RCS to drought stress in cotton have received little attention. This study subjected the drought-tolerant cotton variety “Guoxin 02” and the drought-sensitive variety “Ji 228” to drought stress (8% PEF6000) and no-stress (0% PEG6000) treatments to determine the characteristics and responses of cotton RCS to drought stress. The results showed that the RCS of the two varieties was significantly promoted under drought stress. The greater the distance from the root tip, the more severe the RCS occurrence under drought stress compared with non-stress treatment. The occurrence of RCS in “Guoxin 02” highered by 14.03%-20.18% compared to “Ji 228” under drought stress. Moreover, the RCS was significantly negatively correlated with root respiration but significantly positively correlated with total root length and leaf water potential ( p < 0.05). Indole-3-acetic acid (IAA) content increased, while abscisic acid (ABA) content decreased as the RCS increased. In summary, endogenous hormones regulated the occurrence of RCS, which reduced the root metabolic costs and seemingly achieved more resource redistribution to new roots, thereby expanding the water absorption capacity of roots to fully utilize deep water resources. Thus, the study demonstrates the potential of RCS in improving the drought stress tolerance of cotton.
04 Mar 2024Submitted to Plant, Cell & Environment
04 Mar 2024Submission Checks Completed
04 Mar 2024Assigned to Editor
04 Mar 2024Review(s) Completed, Editorial Evaluation Pending
14 Mar 2024Reviewer(s) Assigned
13 Jul 20241st Revision Received
16 Jul 2024Submission Checks Completed
16 Jul 2024Assigned to Editor
17 Jul 2024Review(s) Completed, Editorial Evaluation Pending
18 Jul 2024Reviewer(s) Assigned
08 Aug 2024Editorial Decision: Revise Minor
23 Aug 20242nd Revision Received
02 Sep 2024Submission Checks Completed
02 Sep 2024Assigned to Editor
02 Sep 2024Review(s) Completed, Editorial Evaluation Pending
04 Sep 2024Editorial Decision: Accept