Name two plants the aerial stems of which yield food
Answers
Answer:
Explanation:
1. Some weak stemmed plants produce wiry, coiled, sensitive and delicate organs for climbing. They are called tendrils.[1] These may develop from either the axillary bud or the terminal bud of the stem. In Passiflora, the tendrils develop from the axillary bud. In Cissus quadrangularis and in Vitis vinifera the terminal bud develops into tendrils.
2. These are hard, woody, pointed structures meant for protection. They are provided with vascular tissue, which may develop from the axillary bud or terminal buds. They control transpiration by reducing the vegetative growth. In Bougainvillea, Punica granatum and Duranta the axillary bud develop into thorns. In Duranta, the thorns are provided with leaves and flowers. In Punica granatum, the thorns bear leaves and branches. In Carissa carandas the terminal bud produces a pair of thorns. They help in protection.