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Kamal Jit Singh , Harsh Nayyar , Archana Dutta , K. K. Dhir

Abstract

Vegetative propagation studies on the adventitious ischolar_maining of jojoba stem cuttings were made in response to the hormonal effects, ischolar_maining media and seasonal variations. The young sprouts of 1-2 year old branches were better than their green terminal shoot tips. Quick dip (20-30 sec) method of IBA proved to be effective. Yellowing of the underground portion of stem cutting marked the first morphological sign of ischolar_main initiation. IBA 24.6 mM with boric acid 0.5 mM as an additive was best utilized in causing rhizogenesis irrespective of the season. The ischolar_maining percentage success for stem cuttings was highcst (75%) in thc month of April but the survival of the ischolar_mained cuttings was better in February and September trials. Perlite and agropeat mixture (1:1) proved to be the most suited ischolar_maining medium for the purpose of adventitious ischolar_main formation in jojoba. However, for subsequent survival of the plantlets with well-formed ischolar_main system it is essential to transfer them to the soil and sand mixture. The ischolar_mained stem cuttings had no bearing upon the best ischolar_maining phase for their survival.

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Kamal Jit Singh ¹, Anil Kumar Thakur ²

Affiliations
1 Department of Botany, Panjab University, Chandigarh 160 014, IN
2 Department of Botany, Government P.G. College, Solan 173 212, IN

Abstract

Plant ischolar_mains are the main organs through which water, nutrients and pollutants enter the plant body. The ischolar_mains of soybean plants exhibited absence of ischolar_main caps and damaged ischolar_mains when treated with heavy metal cadmium beyond 20 μM. Normally, the ischolar_mains perceive gravity and grow towards it; but, with heavy metal exposure they become gravi-irresponsive and start growing against the gravity and law of nature. As the graviperception sensors lie in the ischolar_main cap, ischolar_mains lose directional growth in the absence of ischolar_main caps and keep growing in the direction of hilum positioning inside the substratum. So far, no study has reported that heavy metals can cause loss of graviperception in the ischolar_mains of plants.

Keywords

Cadmium, Graviperception, Heavy Metals, Root, Soybean.

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