**12. Studies conducted at Tamil Nadu agricultural university**

Expression of metallothionein 3-like protein mRNA in the sorghum cultivars under the chromium (VI) stress was estimated [20]. The *MT3* gene expression in roots after imposition of 100 μM Cr (VI) for five days in fifteen days old seedlings of 2 sorghum cultivars, *viz.* K 10 and CO - 27 (susceptible and tolerant respectively, based on earlier studies on growth and antioxidant polymerase chain reaction (RT–PCR), as described by Kaplana *et al*. [42]. After the reports attained it is shown as the sorghum variety CO - 27 pretreated with the Chromium (VI) represented some great strength band which matches the genetic factor of attention. These suggestions can be increased MT transcript degrees under the chromium strain, predominantly in the forbearing variety. Now it is probable that Reactive Oxygen Species (ROS) and hydrogen peroxide that are produced under the chromium stress acts as signal for inducing MT mRNA transcription. The phytochelatin functions in regulation of essential metals and in the detoxification of several toxic metals. Distinct absence of the phytochelatin are shown in the plants under the Cr (VI) stress. These suggested that there can be enhanced role for the MTs in plants under the chromium stress.
