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<p class="MsoNormal"><span style="font-size:11.0pt">Dear all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Please join us in <a href="https://map.arizona.edu/107">
<b>Marley 230</b></a> on <b>Tuesday, April 8, at 4:00 PM</b> for a seminar presented by Rodrigo Alves Pereira Silva, School of Plant Sciences, University of Arizona. Dr. Duke Pauli will serve as the host.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Zoom link: <a href="https://arizona.zoom.us/j/84253432688">
https://arizona.zoom.us/j/84253432688</a> (password: <b>SPLS2025</b>).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Refreshments will be provided in the Marley Lobby at 3:30 PM.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt">Title: What can canopy temperature reveal about the physiological processes occurring inside cotton plants?<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt">Abstract:</span></b><span style="font-size:11.0pt"> Evaluating cotton genotypic responses to adverse impacts of climate change, such as high heat and water-limiting conditions, is essential for improving
plant resilience. Some physiological measurements of plants, such as canopy temperature (T<sub>C</sub>), stem water potential (Ø<sub>stem</sub>), transpiration (E), and stomatal conductance (<i>g</i><sub>s</sub>), can be used to evaluate crop water stress.
The integration of novel sensing technologies enables high throughput monitoring of crop water status via continuous measurements. In this research, we validated the novel sensing device GoField by Goanna Ag, which continuously measures T<sub>C,</sub> in a
field experiment in the Arizona low desert. We measured four genotypes in 2023 and five in 2024 across well-watered and water-limited conditions. For diurnal ground truth measurements, we used a handheld FLIR infrared camera, whose measurements had a high
correlation with the continuous measurements of the GoField. For further validation of T<sub>C</sub>, we assessed the relationship of T<sub>C</sub> with Ø<sub>stem</sub>, and we found an inverse quadratic curvilinear relationship. This research demonstrates
the continuous relationship of T<sub>C </sub>and Ø<sub>stem</sub> in cotton for the first time and agrees with recent studies in woody perennial species, in which we saw a similar relationship. Conjointly, we found a genotypic difference in the continuous
measurements, T<sub>C </sub>and Ø<sub>stem</sub>, along with the diurnal measurements,
<i>g</i><sub>s</sub> and E, under high atmospheric demand for both treatments. This work revealed the success of integrating novel sensing technologies into the monitoring and understanding of crop water stress, thus reducing the need for traditional time and
labor-intensive methods.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Courier New";mso-ligatures:none">===============================================================<br>
</span><b><span style="font-size:20.0pt;font-family:"Vladimir Script";mso-ligatures:none">Zhongguo Xiong</span></b><span style="font-size:10.0pt;font-family:"Courier New";mso-ligatures:none"> <br>
School of Plant Sciences BIO5 Institute<br>
BIO5 Email: <span style="color:blue"><a href="mailto:zxiong@arizona.edu"><span style="color:blue">zxiong@arizona.edu</span></a></span>
<br>
Phone: (520)-621-9869<br>
Forbes 303, P.O. box 210036 Fax: (520)-621-7186<br>
University of Arizona <br>
Tucson, AZ 85721-0036 <span style="color:blue"><a href="http://ag.arizona.edu/~zxiong"><span style="color:blue">http://ag.arizona.edu/~zxiong</span></a></span><br>
===============================================================</span><span style="font-size:11.0pt;mso-ligatures:none"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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