Change Color of a Emission Texture

Hello, i want to change color of this texture by a script

this is a script i made, but he only change "color emission" of a non-texture material.

 using UnityEngine;
 using System.Collections;
 
 public class ColorChanger : MonoBehaviour
 {
     public Color colorStart;
     public Color colorEnd;
     private float colorDuration = 1.0f;
     private Renderer rend;
 
     void Start()
     {
         rend = GetComponent<Renderer>();
     }
 
     void Update()
     {
         float lerp = Mathf.PingPong(Time.time, colorDuration) / colorDuration;
         Color c = (Color.Lerp(colorStart, colorEnd, lerp));
         rend.material.SetColor("_EmissionColor", c);
     }
 }

Anyone can help me?

Thanks!