[Plantsci] SPLS Tuesday Seminar – Today – Emma Jong, University of Arizona

[Xiong, Zhongguo - (zxiong)]

Dear all,

Please join us in Marley 230 at 4:00 PM today for a seminar presented by Emma Jong from the School of Plant Sciences, University of Arizona.

Zoom link<https://arizona.zoom.us/j/83044711714?pwd=IQ994mWIPwbsRKMnfF9sERx5sNtv4m.1>: https://arizona.zoom.us/j/83044711714 (password: SPLS24).
Refreshments will be provided in the Marley Lobby at 3:30 PM.

Title: Generation of heat-tolerant pollen tubes in Arabidopsis thaliana
[A close-up of x-ray images  Description automatically generated]
Abstract: Increasing global temperatures negatively affects crop yield by inhibiting the production of seeds and/or fruits. Creating and growing crop plants that can overcome heat stress and set seed and fruit at higher temperatures is advantageous to growers. A key aspect of fruit and seed yield is delivery of sperm cells to the ovules by the pollen tube (PT), a process that is highly susceptible to heat stress (HS). Tomato is an economically important crop and a genetic model with genome-sequenced thermosensitive and thermotolerant varieties. Our lab found that in tomato PTs, steady-state levels of callose deposition in cell walls are higher in thermotolerant varieties and remained higher upon HS. Here we show that overexpressing a tomato signaling protein, which positively controls callose levels, in Arabidopsis thaliana PTs rendered them thermotolerant. Future research will aim to uncover the role of this signaling pathway and callose deposition in PT cell walls under HS conditions.

Happy Thanksgiving!

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Zhongguo Xiong
School of Plant Sciences       BIO5 Institute
BIO5                           Email: zxiong at arizona.edu<mailto:zxiong at arizona.edu>
                               Phone: (520)-621-9869
Forbes 303, P.O. box 210036    Fax: (520)-621-7186
University of Arizona
Tucson, AZ 85721-0036          http://ag.arizona.edu/~zxiong
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