1. Saccharum officinarum: Known as the noble cane, this species is cultivated for its high sugar content.
2. Saccharum spontaneum: A wild species used for breeding and improving sugarcane varieties due to its disease resistance.
3. Saccharum barberi: Found in northern India, it is known for its tolerance to adverse conditions.
4. Saccharum sinense: Commonly cultivated in China, it has moderate sugar content and good adaptability.
These species play a vital role in sugarcane production and breeding programs.
| Class | 0 – 15 | 15 – 30 | 30 – 45 | 45 – 60 | 60 – 75 | 75 – 90 |
|---|---|---|---|---|---|---|
| Frequency | 11 | 8 | 15 | 7 | 10 | 9 |
Leaves of the sensitive plant move very quickly in response to ‘touch’. How is this stimulus of touch communicated and explain how the movement takes place?