{"title":"Broomrape intimidation to rapeseed-mustard production in semi-arid regions","authors":"Jat Rs, D. Sing","doi":"10.15406/APAR.2018.08.00385","DOIUrl":null,"url":null,"abstract":"Orobanche grows underground on the roots of rapeseed-mustard plant in response to germination stimulants secreted by host plant roots after 7-10 days of sowing. The minute size seeds can survive for few hours of life after germination, therefore quickly attach to a host root before their resources exhausted. The parasite attacks the host root through haustoriums and develops underground for about 25-40 days, after which depending upon conditions outside, produce the flowering stalks above ground and looks like a straw to purple coloured scales. It grows upto 15-30 cm in height in clusters above the ground. Orobanche plants are without leaves and upper 2/3 part of stem bears inflorescence which is rather sparse. Each flower bears a small capsule which contains 40,000 to 50,000 or even more minute seeds (0.15-0.5 mm long). The seeds remain viable in soil for up to 20 years (Figure 1). The germinating seed (host dependent seed conditioning and stimulation) produces a germ tube or radical which elongates chemotropically and forms a haustorium that is strongly attached to the plant vascular system.4,5 Life cycle of Orobanche has seed germination, haustorial initiation, attachment, penetration and establishment in the host and emergence of the flowering stalk above soil.6","PeriodicalId":258349,"journal":{"name":"Advances in Plants and Agriculture Research","volume":"7 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advances in Plants and Agriculture Research","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.15406/APAR.2018.08.00385","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
Orobanche grows underground on the roots of rapeseed-mustard plant in response to germination stimulants secreted by host plant roots after 7-10 days of sowing. The minute size seeds can survive for few hours of life after germination, therefore quickly attach to a host root before their resources exhausted. The parasite attacks the host root through haustoriums and develops underground for about 25-40 days, after which depending upon conditions outside, produce the flowering stalks above ground and looks like a straw to purple coloured scales. It grows upto 15-30 cm in height in clusters above the ground. Orobanche plants are without leaves and upper 2/3 part of stem bears inflorescence which is rather sparse. Each flower bears a small capsule which contains 40,000 to 50,000 or even more minute seeds (0.15-0.5 mm long). The seeds remain viable in soil for up to 20 years (Figure 1). The germinating seed (host dependent seed conditioning and stimulation) produces a germ tube or radical which elongates chemotropically and forms a haustorium that is strongly attached to the plant vascular system.4,5 Life cycle of Orobanche has seed germination, haustorial initiation, attachment, penetration and establishment in the host and emergence of the flowering stalk above soil.6