Allelopathy of rice (Oryza sativa L.) root exudates and its relations with Orobanche cumana Wallr. and Orobanche minor Sm. germination

Ma, Yongqing; Zhang, Meng; Li, Yaolin; Shui, Junfeng; Zhou, Yuegui

doi:10.1080/17429145.2014.912358

Cited by 30 publications

(17 citation statements)

References 35 publications

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“…Our findings are in agreement with the reported allelopathic potential of wheat for germination stimulation of O. minor [26]. Previously, root exudates from rice have been shown to alter seed germination in O. cumana Wallr and O. minor [27], suggesting crop-based biostimulants for broomrape seed germination. Moreover, consistent effects were observed for the Egyptian broomrape seeds which showed no significant germination to these biochemicals.…”

Section: Differential Response Of Broomrape Species Indicates the Allsupporting

confidence: 93%

A Two-Year Simulated Crop Rotation Confirmed the Differential Infestation of Broomrape Species in China Is Associated with Crop-Based Biostimulants

et al. 2019

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In Yanqi County of Xinjiang Uygur Autonomous Region, China, broomrape species (Orobanche cumana Wallr and Phelipanche aegyptiaca Pers.) contribute to significant losses of processing tomato and sunflower. During the past decades, a significant infestation pattern was observed between these broomrape species with no scientific peer-reviewed explanation. A two-year pot experiment simulating the crop rotation and an independent hydroponic experiment were performed to address the problem and indicate the main reason behind the differential infestation pattern. Different varieties of three crops (sugar beet, pepper, and wheat) were grown in rotation with tomato and sunflower to identify a crop-rotation induced control mechanism on these two broomrape species. Germination bioassays were performed in vitro to identify stimulation of plant biochemicals collected as methanolic shoots/roots extracts and root exudates on the germination patterns of broomrape seeds. Results indicated that sunflower broomrape soil seed banks reduced during the two-year crop rotation; however, Egyptian broomrape seed banks did not alter and the resulting parasitism significantly reduced tomato growth. Seed germination bioassays confirmed that the methanolic shoot/root extracts successfully stimulate sunflower broomrape seeds germination but fail to stimulate Egyptian broomrape seeds germination. Root exudates collected from hydroponically grown crops also confirmed differential germination patterns in both broomrape species. Current results are of vital importance to explain the control effect of a crop rotation system and moreover, lay the foundation to study the genetic evolution of broomrape species that results in their differential germination responses to natural stimuli.

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Section: Differential Response Of Broomrape Species Indicates the Allsupporting

confidence: 93%

A Two-Year Simulated Crop Rotation Confirmed the Differential Infestation of Broomrape Species in China Is Associated with Crop-Based Biostimulants

et al. 2019

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“…and clover broomrape (Orobanche minor Sm.) [18], barnyardgrass (Echinochloa crus-galli L.) [19], arrowhead (Sagittaria montevidensis) [20], alfalfa (Medicago sativa L.), cress (Lepidium sativum L.), lettuce (Lactuca sativa L.) [21], and hedgemustard (Sisymbrium officinale L.) [22]. However, inhibitory effects of dehulled rice (dehusked rice or brown rice) on paddy weeds are less concerned.…”

Section: Introductionmentioning

confidence: 99%

Allelopathic Activity of Dehulled Rice and its Allelochemicals on Weed Germination

Khang

Anh

et al. 2016

ILNS

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In this study, the allelopathic potential of dehulled rice, rice, and hulls of rice on germination of weeds was evaluated in laboratory. Phenolic acids in growth media of these plants were also identified and quantified using HPLC. Identified allelochemicals were reversely tested for phytotoxic effects on germination and seedling growth of barnyardgrass, lettuce, radish and rice. The results showed that the inhibitory effects of dehulled rice were stronger than those of hulls and rice. Dehulled rice caused 66.7% and 50.6% reduction in radish root length and lettuce shoot height, respectively. Dehulled rice showed strong inhibitory effects on root length of lettuce and shoot height of radish while hulls and rice exhibited stimulation. Regarding phenolic identification, vanillin and vanillic acid were detected as allelochemicals in root exudates of rice and tested plants. The results revealed that most of the vanillin and vanillic acid treatments showed high inhibitory effects on germination rates and seedling growth of lettuce and radish, high stimulatory activity on root elongation of rice. Vanillic acid (100 ppm and 200 ppm), vanillin (100 ppm) and their mixture (200 ppm) completely inhibited survival of lettuce. The findings indicate the allelopathic potential of dehulled rice which can be used for identification of more phytotoxins to produce bioherbicides in agricultural practices.

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“…Soil microorganism will also influence allelopathic potential of plants (Zuo, et al, 2014), which will then influence establishment of the parastic relation between host and weeds. In respect to a host, the concentration of its root exudates will influence sprouting of Orobanche seeds (Joel, et al, 2011;Yoneyama, et al, 2010;Ma, et al, 2014), but it is also worthy to further research whether the theory "high concentration restains seed sprouting, low concentration causes induction" is universal in the parasitic system. Ratio of N, P and K will influence Orobanche's parasitism in tobacco (Zhang, et al, 2015), but the applicability of an indoor simulated ratio in field production shall also take into account transformation and fixation of each nutrient in soil.…”

Section: Discussionmentioning

confidence: 99%

Distribution Rules of Nutrients in Orobanche Aegyptiaca-Tomato Parasitic System

Zhi¹,

Chen²,

Zheng³

et al. 2016

IJHIT

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Allelopathy of rice (Oryza sativa L.) root exudates and its relations with Orobanche cumana Wallr. and Orobanche minor Sm. germination

Cited by 30 publications

References 35 publications

A Two-Year Simulated Crop Rotation Confirmed the Differential Infestation of Broomrape Species in China Is Associated with Crop-Based Biostimulants

A Two-Year Simulated Crop Rotation Confirmed the Differential Infestation of Broomrape Species in China Is Associated with Crop-Based Biostimulants

Allelopathic Activity of Dehulled Rice and its Allelochemicals on Weed Germination

Distribution Rules of Nutrients in Orobanche Aegyptiaca-Tomato Parasitic System

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